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标题: GWD 4-28, 请教了，谢谢 [打印本页]

作者: huxiang815 时间: 2009-1-15 18:19
标题: GWD 4-28, 请教了，谢谢

Q28:

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?

Whether
anti-termite pesticides dissipate more slowly in furnished rooms than in
plywood boxes
Whether
people who apply anti-termite pesticide standardly wear protective
equipment that prevents them from being exposed to the pesticide
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
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
Whether
anti-termite pesticides that are not toxic to humans tend to take longer to
dissipate than those that are toxic

实在是不懂，谢谢了

作者: 286的幸福观 时间: 2009-1-15 18:46
The test of the rate at which anti-termite pesticides dissipates is conducted in the room-sized plywood boxes, which is considered to be a representative of virtual room. If A is not true, the result of the test is valuable to evaluate a dissipation time.otherwise, it is unsounded and not pragmatic.

[此贴子已经被作者于2009-1-15 18:47:34编辑过]

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