Câu hỏi:
29/03/2020 212Read 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 questions
Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.
The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.
In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world‟s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.
The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.
Question:With what topic does this passage primarily deal?
Đáp án chính xác
Câu hỏi trong đề:
30 đề thi thử thpt quốc gia tiếng anh năm 2020 cực hay có lời giải !!
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Trả lời:
Giải bởi Vietjack
Đáp án D
Chủ đề nào đoạn văn này chủ yếu giải quyết?
A. Sự nguy hiểm của hóa chất độc hại.
B. Đề xuất cấm sử dụng tất cả các chất diệt cỏ.
C. Tầm quan trọng của ngành công nghiệp hoá chất.
D. Ưu điểm của tác nhân sinh học hơn những hóa chất.
=> đáp án D
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
Students are expected to always adhere to school regulations.
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Câu 2:
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions
To attract someone‟s attention, we can use either verbal and non-verbal forms of communication.
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Câu 3:
Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.
Mary is talking to a porter in the hotel lobby.
- Porter: "Shall I help you with your suitcase?” - Mary: “…………”
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Câu 4:
Choose the best answer for each of the following sentences
Lucy was late for school this morning because the alarm didn’t ……..as usual.
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Câu 5:
Mark the letter A, B, C or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
A number of programs have been initiated to provide food and shelter for the underprivileged in the remote areas of the country.
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Câu 6:
Choose the word in each group that has the underlined part pronounced differrently from the rest
A. talked B. naked C. liked D. asked
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Câu 7:
Choose the best answer for each of the following sentences
We need to import……..from abroad.
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