常温下，将100mL的空气通过足量灼热的铜网，充分反应后，恢复到常温，余下气体的体积约为

题干

常温下，将100mL的空气通过足量灼热的铜网，充分反应后，恢复到常温，余下气体的体积约为（）

A：80 mL

B：60 mL

C：40 mL

D：20 mL

上一题下一题 0.0难度选择题更新时间:2018-11-26 03:50:29

A

根据下列小题描述，从A-F中选择各位感兴趣的信息。（其中有一项多余）

① ____ Tom is looking for his schoolbag. He wants to do his homework.

② ____ Mike can't find the model plane. He is worried.

③ ____ Linda lost her ID card. She is asking her friends about it.

④ ____ An English book is in the teacher's office. Is it yours?

⑤ ____ Some keys are in the computer room. Call Mary if you lost keys.

A. A nice model plane is on the playground. Is it yours? Email me at hz163.com.

B. Tina lost some keys. She must find them.

C. I have to read English. But where's it? Call Gina at 86805598.

D. An ID card is in the school library. Its number is 123456AM. Is it yours?

E. A schoolbag is found in the computer room. A computer game and some CDs are in it.

F. A bag with some books and a pencil case is in Classroom 1206. Is it yours?