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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun .In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation, however, is of little use to most average people.Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers; their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number of their neutrons and protons. In most lighter atoms , the number of neutrons and protons is equal , and the element is stable. In heavier atoms, however, there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached. Electrons are negatively charged particles. They are bound to their atoms through electromagnetic attraction. Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they cannot be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameter of a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit. These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees, electrons will gain energy and move to a higher shell, but only momentarily. When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow.Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.The phrase one another in paragraph 3 refers to

Tiếng Anh Tốt nghiệp THPT
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364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết (Phần 2)

Cường độ dòng điện không đổi chạy qua dây tóc của một bóng đèn là I = 0,5 A; điện lượng dịch chuyển qua tiết diện thẳng của dây tóc trong một phút là

Vật lý Lớp 11
Xem chi tiết 517 lượt xem 5 năm trước
283 Bài trắc nghiệm Mắt và các dụng cụ quang cực hay có lời giải chi tiết (Phần 6)

Một lăng kính thuỷ tinh có chiết suất n = 1,5. Một tia sáng qua lăng kính có góc lệch cực tiểu bằng góc chiết quang A của lăng kính. Tính góc chiết quang A

Vật lý Lớp 11
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568 Bài trắc nghiệm ôn tập Điện tích. Điện trường cực hay có lời giải chi tiết (Vật lí 11) (Đề số 5)

Hai điện tích điểm có độ lớn bằng nhau đặt trong không khí cách nhau 4 cm thì lực hút giữa chúng là 10-5 N. Để lực hút giữa chúng là 2,5.10-6 N thì chúng phải đặt cách nhau 

Vật lý Lớp 11
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun .In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation, however, is of little use to most average people.Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers; their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number of their neutrons and protons. In most lighter atoms , the number of neutrons and protons is equal , and the element is stable. In heavier atoms, however, there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached. Electrons are negatively charged particles. They are bound to their atoms through electromagnetic attraction. Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they cannot be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameter of a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit. These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees, electrons will gain energy and move to a higher shell, but only momentarily. When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow.Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.According to the information in paragraph 2, what will happen if an atom has more neutrons than protons?

Tiếng Anh Tốt nghiệp THPT
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25 câu hỏi Trắc nghiệm Phân bào có đáp án

Kết thúc quá trình Nguyên phân, số NST có trong mỗi tế bào con là:

Sinh học Lớp 9
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568 Bài trắc nghiệm ôn tập Điện tích. Điện trường cực hay có lời giải chi tiết (Vật lí 11) (Đề số 5)

Hai quả cầu nhỏ cùng khối lượng 0,6 g được treo trong không khí bằng hai sợi dây nhẹ cùng chiều dài 50 cm vào cùng một điểm treo. Khi hai quả cầu nhiễm điện giống nhau, chúng đẩy nhau và cách nhau một khoảng 6 cm. Lấy g = 10 m/s2. Độ lớn điện tích của mỗi quả cầu là 

Vật lý Lớp 11
Xem chi tiết 606 lượt xem 5 năm trước
364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết (Phần 2)

Tính số electron đi qua tiết diện thẳng của một dây dẫn kim loại trong 1 giây nếu có điện lượng 15 C dịch chuyển qua tiết diện đó trong 30 giây ?

Vật lý Lớp 11
Xem chi tiết 735 lượt xem 5 năm trước
Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun .In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation, however, is of little use to most average people.Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers; their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number of their neutrons and protons. In most lighter atoms , the number of neutrons and protons is equal , and the element is stable. In heavier atoms, however, there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached. Electrons are negatively charged particles. They are bound to their atoms through electromagnetic attraction. Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they cannot be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameter of a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit. These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees, electrons will gain energy and move to a higher shell, but only momentarily. When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow.Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.The word stable in paragraph 2 is closet in meaning to

Tiếng Anh Tốt nghiệp THPT
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25 câu hỏi Trắc nghiệm Phân bào có đáp án

Trạng thái của NST ở kì cuối của quá trình Nguyên phân như thế nào?

Sinh học Lớp 9
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun .In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation, however, is of little use to most average people.Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers; their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number of their neutrons and protons. In most lighter atoms , the number of neutrons and protons is equal , and the element is stable. In heavier atoms, however, there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached. Electrons are negatively charged particles. They are bound to their atoms through electromagnetic attraction. Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they cannot be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameter of a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit. These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees, electrons will gain energy and move to a higher shell, but only momentarily. When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow.Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.According to paragraph 2, an atom’s atomic number is determined by

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 544 lượt xem 5 năm trước
25 câu hỏi Trắc nghiệm Phân bào có đáp án

Ở kì giữa của quá trình nguyên phân, các NST kép xếp thành mấy hàng trên mặt phẳng xích đạo?

Sinh học Lớp 9
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.Atomic were once thought to be fundamental pieces of matter, but they are in turn made of smaller subatomic particles. There are three major subatomic particles neutrons, protons, and electronic. Protons and neutrons can be broken into even smaller units, but these smaller units do not occur naturally in nature and are thought to only be produced in manmade particle accelerators and perhaps in extreme stellar events like supernovas. The structure of an atom can best be described as a small solar system, with the neutrons at the center and the electrons circling them in various orbits, just as the planets circle the sun .In reality, the structure of an atom is far more complex, because the laws of physics are fundamentally different at the atomic level than of the level of the observable word. The true nature of atomic structure can only be expressed accurately through complex mathematical formulas .This explanation, however, is of little use to most average people.Protons and neutrons have nearly equal mass and size, but protons carry a positive electrical charge, while neutrons carry no charge at all. Protons and neutrons are bound together by the strong nuclear force, one of the four basic forces in the universe. Protons and neutrons give atoms some of their most basic properties. Elements are defined by two numbers; their atomic number , which is equal to the number of protons they have, and their atomic weight , which is equal to total number of their neutrons and protons. In most lighter atoms , the number of neutrons and protons is equal , and the element is stable. In heavier atoms, however, there are more neutrons than protons , and the element is unstable, eventually losing neutrons through radioactive decay until a neutral state is reached. Electrons are negatively charged particles. They are bound to their atoms through electromagnetic attraction. Opposite electrical charges attract one another, so the positive charge of the proton helps keep the negatively charged electron in orbit around the nucleus of the atom. Electrons are different from neutrons in that they cannot be broken down into smaller particles. They are also far smaller and lighter than neutrons and protons. An electron is about one thousandth of the diameter of a proton and an even smaller fraction of its mass. Electrons circle the protons and neutrons at the center of the atom in orbit. These orbits are often called electron shells. The closer the orbit is to the center of the atom, the lower its energy is. There are seven electron shells, and each higher level can hold more electron than the previous shell. Electrons naturally seek to occupy the lowest shell possible .So if there is space in a lower shell, an electron will drop down to occupy that space. At temperatures higher than a few hundred degrees, electrons will gain energy and move to a higher shell, but only momentarily. When the electrons drop back down to their natural shell, they emit light .This is why fires and other very hot objects seem to glow. Electrons are also primarily responsible for many of the chemical properties of atoms. Since electrons seek to occupy the lowest electron shell possible, they will move from one atom to another if there is a space available in a lower electron shell. For example, if there is an atom with an open space in its third shell, and it comes into contact with an atom with electrons in its fourth shell, the first atom will take one of these electrons to complete its third shell. When this happens, the two atoms will be chemically bonded to form a molecule. Furthermore, atoms sometimes lose electrons in collisions with other atoms. When it happens, the radio of protons and electrons in the atom changes, and therefore, the overall electrical charge of the atom changes as well. These atoms are called isotopes, and they have significantly different chemical properties from their parent atoms.In paragraph 1, why does the author compare the structure of an atom to a solar system?

Tiếng Anh Tốt nghiệp THPT
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25 câu hỏi Trắc nghiệm Phân bào có đáp án

Trong quá trình nguyên phân, sự tự nhân đôi của NST diễn ra ở kì nào?

Sinh học Lớp 9
Xem chi tiết 20 K lượt xem 5 năm trước
568 Bài trắc nghiệm ôn tập Điện tích. Điện trường cực hay có lời giải chi tiết (Vật lí 11) (Đề số 5)

Tại ba đỉnh A, B, C của một tam giác đều có cạnh bằng 15 cm có ba điện tích điểm qA = 2μC, qB = 8μC và qC = -8μC. Lực tác dụng lên qA có độ lớn 

Vật lý Lớp 11
Xem chi tiết 586 lượt xem 5 năm trước
347 Bài trắc nghiệm Dao động cơ có lời giải chi tiết (P1)

Một con lắc đơn quả cầu có khối lượng m, đang dao động điều hòa trên Trái Đất trong vùng không gian có thêm lực F có hướng thẳng đứng từ trên xuống. Nếu khối lượng m tăng thì chu kì dao động nhỏ

Vật lý Lớp 12
Xem chi tiết 5.7 K lượt xem 5 năm trước
364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết (Phần 2)

Đặt vào hai đầu một điện trở 20 Ω một hiệu điện thế 2 V trong khoảng thời gian 20 s. Lượng điện tích dịch chuyển qua điện trở này khi đó bằng: 

Vật lý Lớp 11
Xem chi tiết 41 K lượt xem 5 năm trước
25 câu hỏi Trắc nghiệm Phân bào có đáp án

Từng NST kép tách nhau ở tâm động thành 2 NST đơn phân li về 2 cực của tế bào. NST bắt đầu tháo xoắn. Qúa trình này là ở kì nào của nguyên phân?

Sinh học Lớp 9
Xem chi tiết 45.2 K lượt xem 5 năm trước
Ôn tập chương Lực đàn hồi cực hay có lời giải

Phải treo 1 vật có khối lượng bằng bao nhiêu vào lò xo có độ cứng 100N/m để lò xo giãn ra được 5cm.Lấy g = 10  m/s2

Vật lý Lớp 10
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30 Đề thi thử thpt quốc gia môn Toán có lời giải chi tiết mới nhất (Đề số 18)

Cho hình lập phương ABCD.A'B'C'D' có A(0;0;0), B(1;0;0), D(0;1;0) và A'(0;0;1). Gọi (P): ax+by+cz+d=0 là mặt phẳng chứa đường thẳng CD' và tạo với mặt phẳng (BB'D'D) góc nhỏ nhất. Cho T=a+2b+3c+4d. Tìm giá trị nguyên âm lớn nhất của T biết a là số nguyên.

Toán Tốt nghiệp THPT
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364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết (Phần 2)

Điều kiện để có dòng điện là

Vật lý Lớp 11
Xem chi tiết 1.9 K lượt xem 5 năm trước
347 Bài trắc nghiệm Dao động cơ có lời giải chi tiết (P1)

Một con lắc đơn, khối lượng vật nặng m = 100 g, treo trong một điện trường đều hướng thẳng đứng xuống dưới, có độ lớn E = 9800 V/m. Khi chưa tích điện cho quả nặng, chu kì dao động nhỏ của con lắc là 2 s, tại nơi có gia tốctrọng trường g = 9,8 m/s2. Truyền cho quả nặng điện tích q > 0 thì chu kì dao động nhỏ của nó thay đổi 0,002 s. Giá trị q bằng

Vật lý Lớp 12
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.One of Carver’s main concerns is most similar to which of the following present-day causes?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 646 lượt xem 5 năm trước
Ôn tập chương Lực đàn hồi cực hay có lời giải

Một lò xo khi đặt nằm ngang có chiều dài tự nhiên bằng 20cm .Khi bị kéo lò xo có chiều dài 24 cm bằng một lực 5N. Hỏi lực đàn hồi của lò xo bằng 10N thì chiều dài của nó bàng bao nhiêu?

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347 Bài trắc nghiệm Dao động cơ có lời giải chi tiết (P1)

Một con lắc đơn, khối lượng vật nặng tích điện Q, treo trong một điện trường đều có phương thẳng đứng. Tỉ số chu kì dao động nhỏ khi điện trường hướng lên và hướng xuống là 7/6. Điện tích Q là điện tích

Vật lý Lớp 12
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.Which of the following is NOT discussed in the passage as work done by Carver?

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364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết ( Phần 1)

Cường độ dòng điện không đổi qua vật dẫn phụ thuộc vàoI. Hiệu điện thế giữa hai vật dẫn. II. Độ dẫn điện của vật dẫn. III. Thời gian dòng điện qua vật dẫn

Vật lý Lớp 11
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Ôn tập chương Lực đàn hồi cực hay có lời giải

Điều nào sau đây là sai khi nối về đặc điểm của lực đàn hồi?

Vật lý Lớp 10
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.Why does the author mention Thomas Edison’s offer to Carver

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Tổng hợp đề thi THPT Quốc gia có lời giải chi tiết (Đề số 2)

Cho hàm số y=fx có bảng biến thiên như sau.Đồ thị hàm số y=fx−2017+2018 có bao nhiêu điểm cực trị?

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364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết ( Phần 1)

Dòng điện chạy trong mạch điện nào dưới đây không phải là dòng điện không đổi ?

Vật lý Lớp 11
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.The phrase “getting credit” in paragraph 3 can be best replaced with

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 510 lượt xem 5 năm trước
347 Bài trắc nghiệm Dao động cơ có lời giải chi tiết (P1)

Có ba con lắc đơn cùng chiều dài cùng khối lượng cùng được treo trong điện trường đều có hướng thẳng đứng. Con lắc thứ nhất và thứ hai tích điện q1 và q2, con lắc thứ ba không tích điện (sao cho |qE| < mg). Chu kì dao động nhỏ của chúng lần lượt là T1, T2, T3 sao cho T1 = T33, T2 = 5T33. Tỉ số q1q2 là

Vật lý Lớp 12
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Ôn tập chương Lực đàn hồi cực hay có lời giải

Chọn câu sai:

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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.According to the passage, chemurgical can be defined as the

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364 Bài trắc nghiệm Dòng điện không đổi có lời giải chi tiết ( Phần 1)

Dòng điện không đổi là dòng điện có

Vật lý Lớp 11
Xem chi tiết 235 lượt xem 5 năm trước
Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.The word “step” in paragraph 1 could best be replaced with

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 401 lượt xem 5 năm trước
Ôn tập chương Lực đàn hồi cực hay có lời giải

Khi treo quả cầu khối lượng 100g thì lò xo dài 31cm. Khi treo thêm vật khối lượng 200g thì lò xo dài 33cm. Chiều dài tự nhiên và độ cứng lò xo là? Lấy g=10m/s2

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Mỗi loài sinh vật có bộ nhiễm sắc thể đặc trưng bởi

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Read the following passage and circle A, B, C or D to indicate the correct answer to each of the question from 36 to 42George Washington Carver showed that plant life was more than just food for animals and humans. Carver’s first step was to analyze plant parts to find out what they were made of. He then combined these simpler isolated substances with other substances to create new products. The branch of chemistry that studies and finds ways to use raw materials from farm products to make industrial products is called chemurgy. Carver was one of the first and greatest chemurgists of all time. Today the science of chemurgy is better known as the science of synthetics. Each day people depend on and use synthetic materials made from raw materials. All his life Carver battled against the disposal of waste materials and warned of the growing need to develop substitutes for the natural substances being used up by humans. Carver never cared about getting credit for the new products he created. He never tried to patent his discoveries or get wealthy from them. He turned down many offers to leave Tuskegee Institute to become a rich scientist in private industry. Thomas Edison, inventor of the electric light, offered him a laboratory in Detroit to carry out food research. When the United States government made him a collaborator in the Mycology and Plant Disease Survey of the Department of Agriculture, he accepted the position with the understanding that he wouldn’t have to leave Tuskegee. As an authority on plant diseases – especially of the fungus variety – Carver sent hundreds of specimens to the United States Department of Agriculture. At the peak of his career, Carver’s fame and influence were known on every continent.With what topic is the passage mainly concerned?

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283 Bài trắc nghiệm Mắt và các dụng cụ quang cực hay có lời giải chi tiết (Phần 6)

Vật sáng AB đặt trên trục chính và vuông góc với trục chính của một thấu kính hội tụ có tiêu cự 20 cm. Khi đặt vật sáng cách thấu kính 30 cm thì vị trí, tính chất, chiều và độ lớn của ảnh là

Vật lý Lớp 11
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30 Đề thi thử thpt quốc gia môn Toán có lời giải chi tiết mới nhất (Đề số 18)

Cho f(x) không âm thỏa mãn điều kiện fx.f'x=2xf2x+1 và f(0)=0. Tổng giá trị lớn nhất và nhỏ nhất của hàm số y = f(x) trên đoạn [1;3] là

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Số lượng NST trong bộ nhiễm sắc thể lưỡng bội của loài phản ánh

Sinh học Lớp 9
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.Many people love boats. Going out on the water on a warm summer day is a lot of (31) _______. (32) _______ , different people like different kinds of boats. Two of the most popular kinds of boat are sailboats and speedboats. Sailboats use the (33) _______to give them power. They only have small engines. In contrast, speedboats have large engines and go very fast. Furthermore, speedboats are usually not as (34) _______ as sailboats. Speedboats are small so that they can go fast. Sailboats, on the other hand, are big so that they are more comfortable. ( 35) _______, sailboats can travel into the ocean, but this would be very dangerous in a speedboat. You can only use speedboats on rivers or lakesĐiền vào ô số 35

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Ôn tập chương Lực đàn hồi cực hay có lời giải

Hai lò xo được nối nhau cố định. Kéo 2 đầu bằng lực F thì lò xo thứ nhất có k1=100N/m bị dãn ra 3cm; lò xo thứ hai có k2=150N/m  thì bị dãn ra bao nhiêu: 

Vật lý Lớp 10
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40 Bài toán liên quan đến điện tích và định luật Cu - Lông cực hay có lời giải

Hai quả cầu nhỏ tích điện q1=7μC và q2=-5μC kích thước giống nhau cho tiếp xúc với nhau rồi đặt trong chân không cách nhau 5cm. Lực tương tác tĩnh điện giữa chúng sau khi tiếp xúc là:

Vật lý Lớp 11
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.Many people love boats. Going out on the water on a warm summer day is a lot of (31) _______. (32) _______ , different people like different kinds of boats. Two of the most popular kinds of boat are sailboats and speedboats. Sailboats use the (33) _______to give them power. They only have small engines. In contrast, speedboats have large engines and go very fast. Furthermore, speedboats are usually not as (34) _______ as sailboats. Speedboats are small so that they can go fast. Sailboats, on the other hand, are big so that they are more comfortable. ( 35) _______, sailboats can travel into the ocean, but this would be very dangerous in a speedboat. You can only use speedboats on rivers or lakesĐiền vào ô số 34

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347 Bài trắc nghiệm Dao động cơ có lời giải chi tiết (P1)

Một con lắc đơn có chiều dài dây treo 50 cm và vật nhỏ có khối lượng 0,01 kg mang điện tích q = 5.10-6C được coi là điện tích điểm. Con lắc dao động điều hoà trong điện trường đều mà vectơ cường độ điện trường có độ lớn E = 104 V/m và hướng thẳng đứng xuống dưới . Lấy g = 10 m/s2, π = 3,14. Chu kì dao động điều hoà của con lắc là

Vật lý Lớp 12
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15 câu hỏi Trắc nghiệm Cấu tạo nhiễm sắc thể có đáp án

Câu nào sau đây không đúng?

Sinh học Lớp 9
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Đề thi thử thpt quốc gia môn Tiếng Anh cực hay có lời giải chi tiết ( Đề số 19)

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer for each of the blanks.Many people love boats. Going out on the water on a warm summer day is a lot of (31) _______. (32) _______ , different people like different kinds of boats. Two of the most popular kinds of boat are sailboats and speedboats. Sailboats use the (33) _______to give them power. They only have small engines. In contrast, speedboats have large engines and go very fast. Furthermore, speedboats are usually not as (34) _______ as sailboats. Speedboats are small so that they can go fast. Sailboats, on the other hand, are big so that they are more comfortable. ( 35) _______, sailboats can travel into the ocean, but this would be very dangerous in a speedboat. You can only use speedboats on rivers or lakesĐiền vào ô số 33

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 631 lượt xem 5 năm trước
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