十进制数75等于二进制数( )。A．1001011 B．1010101 C．1001

阅读理解。

     London has a new magazine. But it is not printed on paper. Everyone who has a television can receive it

because it in on TV.

      If you want to read the magazine, you have to have a decoder (解码器). Each page of it is numbered,

so you only have to dial the number to choose which subject you want to read about. There is a wide

choice-everything is included from cooking to the latest sports news.

      If you want to read the news, the first thing you have to do is to turn to the index (索引) page which

has an easy-to -temember page number, 100 for example. The news is on pages 101 to 109 so you push

out the numbers and the news appears written across your screen. Perhaps you want to go out in the

afternoon, so you press 181, and a brightly colored weather map appears on the screen.But the weather

is terrible so you decide to go shopping and dial 162 for a list of the week's best bargains. But should you

drive or take the train? To answer that question you only have to press 189 for the traffic report. It is very

simple to use. But probably the best thing about the service is that it is being updated all the time. Journalists

type new material directly onto the screen and whole pages of the magazine can be replaced in minutes.

1. Where can you see this new magazine?  [ ]

A. In a bookshop.

B. In a library.

C. On television.

D. In a reading room.

2. If you want some information about weather, you should press _____. [ ]

A. 162

B. 189

C. 109

D. 181

3. We can know from the passage that _____. [ ]

A. the magazine can be bought at any shop

B. most of the postmen in London will lose their jobs some day

C. everyone can read this magazine if they have a television

D. the readers can get all kinds of information staying at home

4. In the sentence "Each page of it is numbered", here "it" means the _____.[ ]

A. decoder

B. magazine

C. subject

D. program

5. The passage is mainly about _____. [ ]

A. a new magazine that is printed in London

B. a new way of getting news

C. a popular TV program about magazines

D. a new idea of reading quickly

苏俄农民彼得伊里奇斯基在日记里写道：“1922年春，阳光明媚，一股幸福感深深地拥抱着我……”让他产生“幸福感”的原因可能是[ ]

A．政府实行实物配给制

B．可以自由支配纳税后剩余的粮食

C．加入集体农庄，走上合作化道路

D．削减农业税，提高农副产品的收益

不正常的或不希望的能量释放会发生事故，一定会导致伤害.

下列关于2014年外贸运行面临的问题表述正确的有（）。

A.世界经济虽有回暖，但复苏态势不稳

B.中国国内要素成本上升，中小出口企业尤为困难

C.国际市场竞争加剧，产业和订单对外转移加快

D.中国面临要素成本上升、人民币升值、订单向其他国家转移等具体困难

二轴晶透明彩色宝石可能具有（）

A.二色性

B.三色性或多色性

C.无二色性