问题 单项选择题

当硫化氢气体以()的比例与空气或氧气混合,就会爆炸。

A.5.5%~50%

B.4.3%~46%

C.2.2%~36%

D.5%~15%

答案

参考答案:B

完形填空

Today people can use the phone to talk with others almost anywhere on the earth. But  1 you use the phone, you can’t see the person you are talking with. That  2  change in the future.

Now some people are using a kind of telephone called the picture phone or a vision phone(视频电话). Two people  3  are talking can see each other with it.

Picture phones can be useful when you have 4  to show the person you are calling. They may have other uses in the future. One day you may be able to ring up a   5  and ask to see a book. Then you’ll be able to   6  the book over your picture phone. Also you may be able to do shopping through your picture phone. If you see something   7  the newspaper that you want to buy, you can  the shop. People at the shop will show you the thing you’re   9  in over the phone. You’ll be able to shop all over the town and never even leave your room.

The picture phone is really a   10  phone. More and more people will use it.

小题1:A. if                       B. when                C. before

小题2:A. can’t                   B. must                C. may

小题3:A. whom                     B. who                 C. which

小题4:A. something                B. nothing             C. everything

小题5:A. shop                     B. school              C. library

小题6:A. read                     B. see                 C. watch

小题7:A. in                       B. about               C. on

小题8:A. visit                    B. go                  C. call

小题9:A. interested               B. bored               C. interesting

小题10:A. useless                  B. helpless            C. helpful

单项选择题