Danh sách câu hỏi ( Có 2,200,300 câu hỏi trên 44,006 trang )

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Đặt tính rồi tính:6473 – 56454492 – 833

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Đặt tính rồi tính:7284 – 35289061 – 4503

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Tính nhẩm theo mẫuMẫu: 5700 – 200 = 55008400 – 3000 = 54003600 – 600 =6200 – 4000 =7800 – 500 =4100 – 1000 =9500 – 100 =5800 – 5000 =

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Ôn tập Hóa Học 10 cực hay có lời giải (đề số 4)

R+ và X- đều có cấu hình electron là: 1s22s22p63s23p6. Vậy R, X là:

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Vẽ đoạn thẳng AB có độ dài 8 cm rồi xác định trung điểm của đoạn thẳng đó.

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Một cửa hàng có 4283m vải, đã bán được 1635m vải. Hỏi cửa hàng còn lại bao nhiêu mét vải?

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Đặt tính rồi tính9996 - 66692340 - 512

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Đặt tính rồi tính5482 - 19568695 - 2772

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Phép trừ các số trong phạm vi 10 000

Tính:6385-2927    7563-4908    8090-7131    3561-924

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Một cửa hàng buổi sáng bán được 432l dầu, buổi chiều bán được gấp đôi buổi sáng. Hỏi cả hai buổi cửa hàng bán được bao nhiêu lít dầu?

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Đặt tính rồi tính:4827 + 2634805 + 6475

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Đặt tính rồi tính:2541 + 42385348 + 936

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Tính nhẩm (theo mẫu)Mẫu: 6000 + 500 = 65002000 + 400 =300 + 4000 =7000 + 800 =9000 + 900 =600 + 5000 =

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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderWhat does the passage mainly discuss?

Tiếng Anh Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderThe level of acidity in the ocean is increased by ________.

Tiếng Anh Tốt nghiệp THPT
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Tính nhẩm:

Toán Lớp 3
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderThe bleaching of coral reefs as mentioned in paragraph 4 indicates ________.

Tiếng Anh Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderThe word “fragile” in paragragh 4 most probably means_______.

Tiếng Anh Tốt nghiệp THPT
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Nêu tên trung điểm mỗi cạnh của hình chữ nhật ABCDHình trong SGK (trang 102)

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Đội một trồng được 3680 cây, đội hai trồng được 4220 cây. Hỏi cả hai đội trồng được bao nhiêu cây?

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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderAccording to the passage, if some species are not able to adjust quickly to warmer temperatures, ________.

Tiếng Anh Tốt nghiệp THPT
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Đặt tính rồi tính5716 + 1749707 + 5887

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Đặt tính rồi tính2634 + 48481825 + 455

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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderIt is mentioned in the passage that if the global temperature rose by 2 or 3 Celsius degrees ________.

Tiếng Anh Tốt nghiệp THPT
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Tính:5341+1488    7915+1346    5407+2568    8425+618

Toán Lớp 3
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Tuyển tập 25 đề thi thử thpt quốc gia môn Vật lý có lời giải chi tiết (P8)

Trong thí nghiệm giao thoa khe I-âng. Chiếu đồng thời hai bức xạ gồm màu lam có bước sóng 450 nm và màu vàng có bước sóng λ2  vào khe. Trên bề rộng vùng giao thoa người ta đếm được 5 vân màu lục, 8 vân màu vàng và 2 trong 5 vân màu lục nằm ngoài cùng của vùng giao thoa. Xác định bước sóng λ2?

Vật lý Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderThe phrase “dwindling sea ice” in paragraph 2 refers to _______.

Tiếng Anh Tốt nghiệp THPT
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Luyện tập trang 101

Toán Lớp 3
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderThe pronoun “those” in paragragh 2 refers to ________

Tiếng Anh Tốt nghiệp THPT
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Tuyển tập 25 đề thi thử thpt quốc gia môn Vật lý có lời giải chi tiết (P8)

Hai mạch dao động điện từ LC lí tưởng đang có dao động điện từ tự do với cùng tần số với các cường độ dòng điện tức thời trong hai mạch là i1  và i2  được biểu diễn như hình vẽ. Tổng điện tích của hai tụ điện trong hai mạch ở cùng một thời điểm có giá trị lớn nhất bằng:

Vật lý Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems.From “global warming” by Michael Mastrandrea and Stephen H.SchneiderAccording to paragragh 2, when their habitats grow warmer, animals tend to move ________.

Tiếng Anh Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

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. Plants and animals will find it difficult to escape from or adjust to the effect of global warming. Scientists have already observed shifts in the lifecycles of many plants and animals, such as flowers blooming earlier and birds hatching earlier in the spring. Many species have begun shifting where they live or their annual migration patterns due to warmer temperatures. With further warming, animals will tend to migrate toward the poles and up mountainsides toward higher elevations. Plants will also attempt to shift their ranges, seeking new areas as old habitats grow too warm. In many places, however, human development will prevent these shifts. Species that find cities or farmland blocking their way north or south may become extinct. Species living in unique ecosystems, such as those found in polar and mountaintop regions, are especially at risk because migration to new habitats is not possible. For instance, polar bears and marine mammals in the Arctic are already threatened by dwindling sea ice but have nowhere farther to go. Projecting species extinction due to global warming is extremely difficult. Some scientists have estimated that 20 to 50 percent of species could be committed to extinction with 2 to 3 Celsius degrees of further warming. The rate of warming, not just the magnitude, is extremely important for plants and animals. Some species and even entire ecosystems, such as certain types of forest, many not be able to adjust quickly enough and may disappear. Ocean ecosystems, especially fragile ones like coral reefs, will also be affected by global warming. Warmer ocean temperatures can cause coral to “bleach”, a state which if prolonged will lead to the death of the coral. Scientists estimate that even 1 Celsius degree of additional warming could lead to widespread bleaching and death of coral reefs around the world. Also, increasing carbon dioxide in the atmosphere enters the ocean and increases the acidity of ocean waters. This acidification further stresses ocean ecosystems. From “global warming” by Michael Mastrandrea and Stephen H.SchneiderScientists have observed that warmer temperatures in the spring cause flowers to ________.

Tiếng Anh Tốt nghiệp THPT
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

The secretary was upset because she was fired

Tiếng Anh Tốt nghiệp THPT
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We always find Robert’s stories amusing

Tiếng Anh Tốt nghiệp THPT
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Số lớn nhất có bốn chữ số

Toán Lớp 3
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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

The researchers finalized their research methods.

Tiếng Anh Tốt nghiệp THPT
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Luyện tập trang 101

Số lớn nhất có ba chữ số

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Luyện tập trang 101

Số bé nhất có bốn chữ số

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Luyện tập trang 101

Số bé nhất có ba chữ số

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Luyện tập trang 101

Viết các số 4208, 4802, 4280, 4082Theo thứ tự từ lớn đến bé

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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

The airport taxes are included in the ticket price

Tiếng Anh Tốt nghiệp THPT
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Luyện tập trang 101

Viết các số 4208, 4802, 4280, 4082Theo thứ tự từ bé đến lớn

Toán Lớp 3
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Luyện tập trang 101

1000g…1 kg950g…1kg1 km….1200 m100 phút….1 giờ 30 phút

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Luyện tập trang 101

7766…76768453…84359102….91205005…4905

Toán Lớp 3
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So sánh các số trong phạm vi 10 000

Tìm số bé nhất trong các số : 6091, 6190, 6901, 6019

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25 đề thi thử Tiếng Anh chuẩn cấu trúc bộ giáo dục có lời giải chi tiết(p5)

We prefer going by train because we can enjoy the sight

Tiếng Anh Tốt nghiệp THPT
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So sánh các số trong phạm vi 10 000

Tìm số lớn nhất trong các số : 4375, 4735, 4537, 4753

Toán Lớp 3
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So sánh các số trong phạm vi 10 000

Điền dấu > , = , < vào chỗ trống60 phút…1 giờ50 phút….1 giờ70 phút…1 giờ

Toán Lớp 3
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So sánh các số trong phạm vi 10 000

Điền dấu > , = , < vào chỗ trống1 km ...985m600 cm…6m797mm…1m

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