Câu hỏi:
24/06/2023 346
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.
Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Pfiesteria in 3,000-year-old seafloor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria. Lately, however, blooms - or huge, dense populations- of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina's Neuse River, nearly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fishermen and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment. For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and wastewater from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.
What is true of Pfiesteria?
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.
Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive. Such is the case with Pfiesteria piscicida. A one-celled creature called a dinoflagellate, Pfiesteria inhabits warm coastal areas and river mouths, especially along the eastern United States. Although scientists have found evidence of Pfiesteria in 3,000-year-old seafloor sediments and dinoflagellates are thought to be one of the oldest life forms on earth, few people took notice of Pfiesteria. Lately, however, blooms - or huge, dense populations- of Pfiesteria are appearing in coastal waters, and in such large concentrations the dinoflagellates become ruthless killers. The blooms emit powerful toxins that weaken and entrap fish that swim into the area. The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh. Often the damage is astounding. During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina's Neuse River, nearly one billion fish died and bulldozers had to be brought in to clear the remains from the river. Of course, such events can have a devastating effect on commercially important fish, but that is just one way that Pfiesteria causes problems. The toxins it emits affect human skin in much the same way as they affect fish skin. Additionally, fishermen and others who have spent time near Pfiesteria blooms report that the toxins seem to get into the air, where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment. For a while, it seemed that deadly Pfiesteria blooms were a threat only to North Carolina waters, but the problem seems to be spreading. More and more, conditions along the east coast seem to be favorable for Pfiesteria. Researchers suspect that pollutants such as animal waste from livestock operations, fertilizers washed from farmlands and wastewater from mining operations have probably all combined to promote the growth of Pfiesteria in coastal waters.
What is true of Pfiesteria?
Đáp án chính xác
Câu hỏi trong đề:
Đề thi giữa học kì 2 môn Tiếng Anh lớp 12 có đáp án !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Chọn đáp án A.
Giải thích: Ta có thể thấy ở câu “Pollution is a threat to many species on Earth, but sometimes it can cause species to thrive.”
Dịch: Ô nhiễm là mối đe dọa đối với nhiều loài trên Trái đất, nhưng đôi khi nó có thể khiến một số loài phát triển mạnh.
Câu hỏi cùng đoạn
Câu 2:
What is the main function of the toxins emitted by the dinoflagellates?
What is the main function of the toxins emitted by the dinoflagellates?
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án B.
Giải thích: Ta có thể lấy dẫn chứng ở câu “The toxins eventually cause the fish to develop large bleeding sores through which the tiny creatures attack, feasting on blood and flesh.”
Dịch: Các chất độc cuối cùng khiến các vết loét của cá mở rộng và chảy nhiều máu, các sinh vật nhỏ bé tận dụng kẽ hở đó để tấn công, ăn thịt.
Câu 3:
All of the following are true, according to the passage, EXCEPT
All of the following are true, according to the passage, EXCEPT
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án A.
Giải thích: Dựa vào câu “During a 1991 fish kill, which was blamed on Pfiesteria on North Carolina’s Neuse River, nearly one billion fish died”
Dịch: Trong một cá chết hàng loạt năm 1991, nguyên nhân là do Pfiesteria trên sông Neuse của Bắc Carolina, khiến gần một tỷ con cá đã chết
Câu 4:
The word "astounding" in the passage is closest in meaning to
The word "astounding" in the passage is closest in meaning to
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án B.
Giải thích: astouding (adj) khó tin.
Dịch: Thường thì thiệt hại lớn đến khó tin.
Câu 5:
According to the paragraph 2, what will NOT happen if one breathes the toxic air?
According to the paragraph 2, what will NOT happen if one breathes the toxic air?
Đáp án chính xác
Lời giải của GV VietJack
Chọn đáp án C.
Giải thích: Dựa vào câu “where once inhaled they affect the nervous system, causing severe headaches, blurred vision, nausea, breathing difficulty, short-term memory loss and even cognitive impairment.”
Dịch: Khi hít phải chúng sẽ ảnh hưởng đến hệ thần kinh, gây đau đầu dữ dội, mờ mắt, buồn nôn, khó thở, mất trí nhớ ngắn hạn và thậm chí là suy giảm nhận thức.
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Current extinction rates are at least 100 to 1,000 times higher than____ rates found in the fossil record.
Current extinction rates are at least 100 to 1,000 times higher than____ rates found in the fossil record.
Xem đáp án »
25/07/2022
9,024
Câu 2:
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
On 18 December 1979, the Convention on the Elimination of All Forms of Discrimination against Women was adopted by______United Nations General Assembly.
Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.
On 18 December 1979, the Convention on the Elimination of All Forms of Discrimination against Women was adopted by______United Nations General Assembly.
Xem đáp án »
25/07/2022
2,893
Câu 3:
Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
I couldn't make out what he had talked about because I was not used to his accent
Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
I couldn't make out what he had talked about because I was not used to his accent
Xem đáp án »
23/07/2022
2,750
Câu 4:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
He could escape from hurt because he was wearing protective clothes.
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
He could escape from hurt because he was wearing protective clothes.
Xem đáp án »
23/07/2022
1,615
Câu 5:
Founded after World War II by 51 "peace-loving states" combined to oppose future aggression, the United Nations now counts 192 member nations, (17)___its newest members, Nauru, Kiribati
Xem đáp án »
05/07/2023
1,254
Câu 6:
Jack: "Would you like to join our volunteer group this summer?" -Jill: " .”
Jack: "Would you like to join our volunteer group this summer?" -Jill: " .”
Xem đáp án »
25/07/2022
528
Câu 7:
A_____is a book, film, or play that tells an exciting fictional story about something such as criminal activities or spying.
A_____is a book, film, or play that tells an exciting fictional story about something such as criminal activities or spying.
Xem đáp án »
26/07/2022
420
về câu hỏi!