连续供氧系统中控制流出面罩的氧气量的方法是:().
A.在系统供向面罩的出口处装有定流孔
B.使用减压活门
C.使用不同直径的氧气管
D.使用流量调节活门
参考答案:A
名著阅读。
母亲啊!
天上的风雨来了,
鸟儿躲在它的巢里;
心中的风雨来了,
我只躲到你的怀里。
这是著名女作家__________的小诗,她已步入文坛,就以宣扬“爱的哲学”著称。这些小诗被收录在她的诗集《__________》、《春水》中总的说来,它们大致包括三个方面,一是对母爱与童真的歌颂,二是__________,三是___________。
在对话空白处根据所给的首字母填入适当的单词,完成对话。
A: Did you have a great (1)t on your vacation?
B: Yes, I (2)d .
A: (3)W did you do on vacation?
B: I (4)v my grandparents in Emei Mountains.
A: (5)H were your grandparents?
B: They were fine. Thank you.
A: So (6)d you go to the mountains?
B: Of course, I did. And I saw (7)l of animals and tall trees there.
A: Did you give food to the monkeys?
B: Yes, I did. It was really interesting.
A: What (8)e did you do there?
B: I (9)t some (10)p . Look here, my photos.
A: Wow, They're great.