Where do pesticides（杀虫剂）fit into the picture of environmental disease? We have seen that they now pollute soil, water, and food, that they have the power to make our streams fishless and our gardens and woodlands silent and birdless. Man, however much he may like to pretend the contrary, is part of nature. Can he escape a pollution that is now so thoroughly distributed throughout our world?

We know that even single exposures to these chemicals, if the amount is large enough, can cause extremely severe poisoning. But this is not the major problem. The sudden illness or death of farmers, farm workers, and others exposed to sufficient quantities of pesticides is very sad and should not occur. For the population as a whole, we must be more concerned with the delayed effects of absorbing small amounts of the pesticides that invisibly pollute our world.

Responsible public health officials have pointed out that the biological effects of chemicals are cumulative over long periods of time, and that the danger to the individual may depend on the sum of the exposures received throughout his lifetime. For these very reasons the danger is easily ignored. It is human nature to shake off what may seem to us a threat of future disaster. “Men are naturally most impressed by diseases which have obvious signs,” says a wise physician, Dr.Rene Dubos, “yet some of their worst enemies slowly approach them unnoticed.”

1.Which of the following is closest in meaning to the sentence “Man, … is part of nature.”(Line 3,Para.1)?

A. Man appears indifferent to what happens in nature.

B. Man acts as if he does not belong to nature.

C. Man can avoid the effects of environmental pollution.

D. Man can escape his responsibilities for environmental protection.

Best Answer:B

详解：B)。词汇题。答题要害在于正确了解”like to pretend the contrary”几个词的意义，这几个词字面原意为：喜爱假装相反。把它与原句联系起来看，这一句的意思是：人类，尽管常常体现得刚好相反，却是天然的一有些。据此句意来套四个选择项，就可看出B)(人类体现得如同他不归于天然)是正确答案。

2.What is the author’s attitude towards the environmental effects of pesticides?

A. Pessimistic.

B. Indifferent.

C. Defensive.

D. Concerned.

Best Answer:D

详解：D)。观念题。这篇文章就作者对杀虫剂的环境成果的情绪发问。纵观全文可知，作者在文中逐个描绘了杀虫剂显着和潜在的两方面风险，提示我们注重其缓慢的长时刻效应，可见作者对这一疑问是“关怀的”(D)项)，而非是“无视置之的”(B)项)。一起，作者在文中并未悲天悯人，认为杀虫剂的损害已不可以救药，所以A)项“绝望的”也不契合题意。而C)项“防护性的”，在文中并无根据，因为在文中作者并未提出该怎样处置杀虫剂的环境成果疑问，因而只需D)是最契合题意的正确答案。

3.In the author’s view, the sudden death caused by exposure to large amounts of pesticides_____.

A. is not the worst of the negative consequences resulting from the use of pesticides

B. now occurs most frequently among all accidental deaths

C. has sharply increased so as to become the center of public attention

D. is unavoidable because people can’t do without pesticides in farming

Best Answer:A

详解：A)。揣度题。本题的答案首要见于第二段。从”But this is not the major problem”.（但这并不是首要疑问）及”…,we must be more concerned with the delayed effects…，（咱们有必要更关怀因为小剂量地吸收无形中污染了咱们世界的杀虫剂而构成的推迟的成果）”咱们可从中揣度出作者认为“因为大剂量吸入杀虫剂而俄然致死”还不是最糟糕的情况，故A)是正确的。而B)、C)、D)项的内容在文中均未提及，所以无法判别是不是是作者的观念，因而不

能当选正确答案。

4.People tend to ignore the delayed effects of exposure to chemicals because ______.

A. limited exposure to them does little harm to people’s health

B. the present is more important for them than the future

C. the danger does not become apparent immediately

D. humans are capable of withstanding small amounts of poisoning

Best Answer:C

详解：C)。揣度题。本题可用选择法，逐个打扫差错答案。我们简略无视吸入有毒化学物质所带来的推迟成果，究竟是因为啥呢？先看A)：有限的吸收不会给人类安康带来损害。根据第三段内容可知，有毒化学物质的生物作用是累积的，而且累积越多，风险越大，因而，即就是有限的吸收，也会有匿伏的风险，可见A)项内容差错。相同D)项“人类能饱尝住小剂量有毒物质损害”显着也不对。再看B)：如今比将来重要。根据最终一段第三句，人类的赋性是会忽略将来的风险的，但这并不等于说如今就更重要，所以B)项也没有正确说明本题中的缘由。只需C)项“风险并没有马上闪现出来”，契合原辞意旨，特别是最终一句的句意，所以C)是正确答案。

5.It can be concluded from Dr.Dubos’remarks that _____.

A. people find invisible diseases difficult to deal with

B. attacks by hidden enemies tend to be fatal

C. diseases with obvious signs are easy to cure

D. people tend to overlook hidden dangers caused by pesticides

Best Answer:D

详解：D)。揣度题。本题要害在于正确了解Dr.Dubos的谈论。原句意为：人类很天然地最简略对那些具有预兆的疾病形象深化，可是有些最丧命的疾病却是逐渐地毫无发觉地击中他们的。据此句意，可以简略地揣度出D)为正确答案。