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DDT, the most powerful pesticide the world had ever known, exposednature’s
DDT, the most powerful pesticide the world had ever known, exposednature’s
游客
2024-12-25
30
管理
问题
DDT, the most powerful pesticide the world had ever known, exposed
nature’s vulnerability. Unlike most pesticides, which effectiveness is limited (1)______
to destroy one or two types of insects, DDT was capable of killing hun- (2)______
dreds of different kinds at once. Developed in 1939, it first distinguished
itself during World War II, cleaning South Pacific islands of malaria- (3)______
caused insects for U.S. troops, while in Europe being used as an effective (4)______
de-lousing powder. Its inventor was awarded by the Nobel Prize. (5)______
When DDT became available for civilian use in 1945, there were only
a few people who expressed the second thoughts about this new miracle (6)______
compound. One was nature writer Edwin Way Teale, who warned, "A spray
as discriminate as DDT can upset the economy of nature as much as a revo- (7)______
lution upsets social economy. Ninety percent of all insects are good, but if (8)______
they are killed, things go out of kilter right away." Another was Rachel Car
son, who wrote to the Reader’s Digest to propose an article about series of (9)______
tests on DDT being conducted not far from which she lived in Maryland. (10)______
The magazine rejected the idea. [br] (1)
选项
答案
which — whose
解析
whose在这里作关系限定词,与effectiveness构成名词词组在关系分句里作主语。whose的先行词既可以是人,也可指物或抽象概念,如:I saw some trees whose leaveswere black with disease.当whose指具体事物或抽象概念时,能与of which结构互换使用,但前者更普遍,如:This is an idea whose origin is to be found in Green philosophy.This is an idea the origin of which is to be found in Greek philosophy.
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