在发达国家，就业人口中的很大一部分，估计有70%左右从事第三产业。其原因是（）。 A

— Good  afternoon, Miss Lee.  How does Mike feel?

一 He is tired. He          a lot of work ____.      [ ]

A. does, this morning

B. do, this morning

C. did, this morning

下列短文的划线部分是错误的，请将其正确答案书写在后面横线上。

Nowadays people use the phone to talk with other almost anywhere on the world. But when you use the phone, you can't see the person you are talk with. This may change in the near future. Today some people are using a kinds of telephone called the picture Phone or videophone(可视电话).  With it, two people who is talking can see each other. Picture phones are useful if you want to show something to a person you're calling. They may have other uses in the future. One day you may be able to ring for a library and ask read a book. You'll be able to read the book right over your picture phone. Or you may be able to do some shoping through your picture phone. If you want to buy something, you can calling the shop. People at the shop will show you the thing right over the phone. You'll be able to shop all over the world and you needn't leave your room.

( )负责对基金管理人的会计核算结果进行复核。

A．中国证券业协会

B．中国证券登记结算公司

C．基金托管人

D．证券公司

根据《公司法》的规定，上市公司在一年内购买、出售重大资产或者担保金额超过公司资产总额一定比例的，应当由股东大会做出决议，并经出席会议的股东所持表决权的2/3以上通过。该比例为（）

A.30%

B.20%

C.15%

D.10%

安全阀安装前需要进行（），有特殊要求时，还应当进行其他性能试验。

A.整定压力

B.密封试验

C.耐压试验

D.宏观检查