2. 外语
  3. Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that ther

Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that ther

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问题 Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
选项 A、Certain pesticides can become ineffective if used repeatedly in the same place; one reason is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
B、If used repeatedly in the same place, one reason that certain pesticides can become ineffective is suggested by the finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals.
C、If used repeatedly in the same place, one reason certain pesticides can become ineffective is suggested by the finding that much larger populations of pesticide-degrading microbes are found in soils with a relatively long history of pesticide use than those that are free of such chemicals.
D、The finding that there are much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in soils that are free of such chemicals is suggestive of one reason, if used repeatedly in the same place, certain pesticides can become ineffective.
E、The finding of much larger populations of pesticide-degrading microbes in soils with a relatively long history of pesticide use than in those that are free of such chemicals suggests one reason certain pesticides can become ineffective if used repeatedly in the same place.
答案A
解析 Logical predication; Rhetorical construction
The sentence is correctly constructed; it has two independent clauses connected by a semicolon. If used repeatedly in the same place clearly and correctly modifies certain pesticides.
A Correct. The sentence is correctly constructed; the modifier if used repeatedly in the same place is correctly placed.
B If used repeatedly in the same place modifies one reason when it should modify certain pesticides.
C If used repeatedly in the same place modifies one reason when it should modify certain pesticides. The absence of in in the phrase than those ... makes the comparison unclear.
D If used repeatedly in the same place ambiguously modifies one reason when it should clearly modify certain pesticides.
E The comparison the finding of much larger populations ... than in those that... is improperly constructed in a way that makes the finding appear to refer awkwardly to a discovery of larger populations rather than to a research conclusion about the presence of such populations.
The correct answer is A.
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