问答题
急性毒性试验时,每个剂量组小鼠不少于5只,大鼠3-4只。
【参考答案】
答案:错误。在进行急性毒性试验时,通常需要根据试验的目的和要求来确定动物的数量。根据国际上通行的GLP(良好实验室规范)......
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Which of the following teaching objectives does not refer to “language understanding”? ( ) A Understand that the 'ea' pattern has several sounds in English. B Know “be going to” could be used to describe actions, behaviors and events which are to happen in the future. C Tell the meaning of the following words: big, small, long, short, strong. D Understand people from different countries have different ways of greeting and show respect for each other’s custom.
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The fastest these animals can run is about 65kph and ____ their hunting methods have to be very efficient indeed.
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