默咄

阅读理解。

     Radio, telephone and television are widely used in the world. When you witch on the radio, you can listen.

But when you use a telephone, not only can you listen to others but also you can chat with them; however,

you cannot see anything at all. Television is much better than both of them. People can watch TV and listen

to it, but they cannot take part in what they see.

     Today, some people are using a new type of telephone called visionphone. With it two people who are

talking can see each other.

     Visionphones can be of great use when you have something to show the person whom you are calling.

It may also have other uses in the future. Some day you may be able to call up a library and ask to read a

book right over your visionphone. You may be able to do the shopping through it, too. Perhaps in the near

future, visionphone will come into wider use in our everyday life.

1. According to the passage, we can guess that the ________ was invented last.

A. radio

B. television

C. telephone

D. visionphone

2. Maybe the visionphone can take the place of _______ some day.

A. the radio

B. the telephone

C. the television

D. all the above

3. Which of the following is NOT correct?

A. Visionphone is more advanced than radio, telephone or television.

B. People will use visionphone in the future more than now.

C. Visionphone will be helpful in people's daily life.

D. It is impossible to do shopping through visionphone.

慢性阻塞性肺气肿的体征，下列不正确的是（）

A.肺肝浊音界下移

B.心音遥远

C.呼吸音减低

D.胸膜摩擦音

E.桶状胸

将某数乘以﹣1.25时漏了一个负号，所得结果比正确结果小0.25，则正确结果是（    ）．

三相或单相的交流单芯电缆，单独穿于钢导管时，应注意核实电缆的载流量。( )