精液保存的方法是[ ] A.高温保存 B.常温保存 C.低温保存 D.超低温保存

题型:选择题

问题:

精液保存的方法是[ ]

A.高温保存

B.常温保存

C.低温保存

D.超低温保存

考点:体外受精和早期胚胎培养
题型:选择题

下列哪几家商户可设置单笔手续费最高限额。()

A.在大型批发市场有固定摊位的商户

B.食品加工企业的销售点

C.某服装品牌的代理商

D.高档酒店等消费额大的商户

题型:选择题
阅读下面对话,从方框内的选项中选择恰当的句子完成对话。
A. But I argued with my best friend yesterday.
B. That’s a good idea.
C. I don’t have enough time.
D. What should I do?
E. I’ll try to apologize (道歉) to her.
A: I want to get good grades.    小题1:  
B: Maybe you could attend after-school class on weekends.
A:   小题2: I have to do my homework
on weekends.
B: Well, you could ask your friends for help.
A:    小题3: 
B: You should say “sorry” to your friend.
A: OK.    小题4:        
B: I think you shouldn’t play computer games or watch TV any more.
A:    小题5:   I’ll study harder and harder from now on.
F: The weather! English people are always interested in the weather.
题型:选择题

由6个1、8个0.1、和4个0.001组成的小数是______.把它精确到百分位,近似数是______.

题型:选择题

氧气瓶、乙炔气瓶与明火距离不小于5m。两种气瓶也应保持5m以上距离。( )

题型:选择题

机器人吸附式手分为哪两种?各有何特点?

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