鱼类原肠胚形成中，（）的细胞集中形成胚盾。

补全对话。(每小题2分，共10分)

A: What are you going to do after the exam?

B: 小题1:___________________________________. Do you have any good ideas?

A: Yes. I want to relax myself. So I want to go on a trip.

B: Sounds great! 小题2:_______________________________?

A: I’d like to go somewhere interesting and exciting.

B: There is a new zoo in Zhengzhou. 小题3:__________________?

A: No, I haven’t. What about you?

B: 小题4: __________________________________. But my cousin went there last week. He told me people could watch the animals there in a more natural environment.

A: Really? That sounds interesting. Let’s go to the zoo together.

B: OK. We can go there by bus tomorrow.

A: 小题5:____________________? It’s not too far from here. And riding a bike is a kind of good exercise.

B: OK. I can’t wait!

如果咖啡厅客人选择自助餐，服务员应（）。

A.引领客人到自助餐台并帮助客人将食物送上餐桌

B.引领客人到自助餐台，让客人选择自己喜欢的食物和饮料

C.引领客人到自助餐台并介绍食品和饮料

D.让客人自行去选取食物、饮料

城市桥梁桥面铺装多以沥青混凝土铺装形式。

人际关系的出发点和归宿点是( )。

A．动机

B．态度

C．环境

D．需要

时间继电器