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问题 单项选择题

血清中AFP含量超过多少时对原发性肝癌有诊断意义（）

A.10ng／ml

B.50ng／ml

C.100ng／ml

D.200ng／ml

E.400ng／ml

答案

参考答案：E

填空题

根据句意，选用所给动词的适当形式填空

sound       hurry        ask        have        give  

小题1:Mr.Hu with his students ___________a party at the moment.

小题2:Listen! The piece of music _________ very beautiful!

小题3:Mr. Ma ___________ a talk on the history of China next week, isn’t he?

小题4:Hobo often _________ to school without breakfast.

小题5:--Millie, please tell your brother not to cross the road, it is dangerous.

--Thank you, I __________ him to be careful.
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单项选择题

在产品导入期，（）是以低价格和高促销水平的方式推出新产品。

A.快速撇脂

B.快速渗透

C.慢速撇脂

D.慢速渗透
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