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, farmworkers, 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 (累积) over long periods of time, and that the danger to 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."
36. Which of the following is closest in meaning to the sentence "Man... is part of nature" (Para. 1, Lines 3-4)?
(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 effects of pesticides?
37. What is the author’s attitude toward the environmental effects of pesticides?
(A) Pessimistic (C) Defensive
(B) Indifferent (D) Concerned
38. 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
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