作者：英吉
Regulations will not allow a pesticide that is toxic to humans to be used inside houses unless the pesticide will dissipate completely from the air within eight hours after its application. One test that pesticide manufacturers standardly use to determine how quickly anti-termite pesticides dissipate involves spraying the pesticides on the walls of room-sized plywood boxes and then timing its dissipation.
Which of the following would it be most useful to know in order to evaluate whether a dissipation time of just under eight hours on the manufacturers’ test indicates that an anti-termite pesticide that is toxic to humans obeys regulations for use in houses?
A. Whether anti-termite pesticides dissipate more slowly in furnished rooms than in plywood boxes
B. Whether people who apply anti-termite pesticide standardly wear protective equipment that prevents them from being exposed to the pesticide
C. Whether people whose house is being treated with anti-termite pesticide generally know that they should remain out of their house during the hours immediately after the pesticide’s application
D. Whether there are anti-termite pesticides that are toxic to humans that, when subjected to the manufacturers’ test, dissipate completely from the air in the boxes in well under eight hours
E. Whether anti-termite pesticides that are not toxic to humans tend to take longer to dissipate than those that are toxic
题目分析：问题问的是评价两个地方杀虫剂消散时间，A说的是消散快慢问题，与问题所问，相关，留着。B说是否穿保护头盔，离问题较远，杀。C说这帮人是否在屋外带着，扯的远了，杀。D说好像和问题有点联系，留着。E说对人类无毒的杀虫剂，范围不对，杀。A和D两个选项A说那两个地方消散的时间，D说在一个地方消散的时间，哪个和问题更相关？显然是A。
