题目:
词汇运用(每小题1分,共5分)
根据句意,用所给单词的适当形式填空。
小题1: My father and my uncles are all ___________ (policeman).
小题2: That is the ______ (begin) of the garden tour.
小题3: Are the doctors and nurses in the hospital ______ (friend) to you?
小题4: The koalas often sleep during the day and eat ______(leaf) at night.
小题5: Mary enjoys _________(watch) soccer games very much.
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B解析:一种动物实验可能不能预测药物对人的毒性,但在几种动物中,大多数在人身上发生的急性毒性可以在动物上反映出来。药物的危险程度要至少在两种动物上试验,但灵长类动物不是必须的,治疗指数不是...