[C] the danger does not become apparent immediately
[D] humans are capable of withstanding small amounts of poisoning
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
答案:
1.B 2.D 3.A 4.C 5.D
2014年12月20日英语四级真题答案汇总
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