Câu hỏi:
06/04/2020 449Read 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 from 43 to 50.
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.
The word "innate" in paragraph 3 is closest in meaning to________
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Trả lời:
Giải bởi Vietjack
Đáp án C
Từ “ innate” ở đoạn 3 gần nghĩa nhất với
Effective: hiệu quả
Organic: hữu cơ
Natural: thuộc về thiên nhiên, tự nhiên
Dẫn chứng: Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.
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) OPPOSITE in meaning to the underlined word(s) in each of the following questions.
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Câu 2:
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
Setting off on an expedition without thorough preparation and with inadequate equipment is tempting fate
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Câu 3:
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
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Câu 4:
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Câu 5:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
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Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
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Câu 7:
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
Helen is traveling to Germany tomorrow on her first working trip and she is very excited________it
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