根据对话内容填入适当的单词补全对话，使句义完整，符合逻辑，每空限填一个单词。

A: 1.            in the room?

B: There are some kinds of robots made by the students in our school.

A: Really? What are they 2.             for?

B: The one with blue eyes is a guide robot. She can show you around our school.

A: 3.             about the taller one?

B: He is a cook robot. He can cook something nice for you.

A: Oh, I think that's a cleaning robot.

B: Maybe you're right. When he finds waste things, he'll pick them up. He can 4.             our environment clean.

A: That's wonderful! What good students! I'm proud of them.

B: So 5.              I.

附壁血栓一般不会发生在

A．心房
B．小静脉
C．心瓣膜
D．主动脉瘤