通讯控制是现场各种数据通过（）采集，通过高速总线传送到中央控制室集中监控和管理。A、

阅读短文，从每题所给出的(A、B、C、D)四个选项中选出最佳选项。

     Many people have to work on the weekend. Some people do not mind. Other people think it is terrible.

     One man thinks that working on the weekend can be dangerous. He is Graham Coates. Mr. Coates worked

in an office in Brighton, England.

     On Saturday, May 24, 1986, he went to the office to do some work. When he got in the elevator to go home,

it stopped between floors. Mr. Coates could not get out of the elevator. He was trapped (困住了)! He started to

shout, but no one heard him. Then Mr. Coates remembered that it was a holiday in England. No one was going

to come to work until Tuesday!

     There was nothing for Mr. Coates to do. He had to wait until one his coworkers came to work and found

him. With nothing to eat or drink, Mr. Coates ended up sleeping for most of the time. Early on Tuesday morning,

the vice president of the company came into work and found the elevator was not working. When the elevator

was opened, Mr. Coates came out cold, weak, and tired. He had been in the elevator for sixty-two hours!

     Now Mr. Coates says, "I only uses elevators if they have telephones in them."

1. Mr. Coates could not get out of the elevator because ______. [ ]

A. it was broken

B. it was a weekend

C. it was a holiday

D. it stopped on a wrong floor

2. How long did he stay in the elevator? [ ]

A. Twenty-four hours.

B. From Saturday to Monday.

C. More than sixty hours.

D. From Tuesday to Saturday.

3. What did he do in the elevator most of the time? [ ]

A. Shouted and screamed.

B. Slept and waited.

C. Telephoned his boss.

D. Ate and drank.

4. How did he make his way out in the end? [ ]

A. The vice-president found him.

B. Some one opened the elevator.

C. The elevator began to work on Tuesday.

D. He found a door in the elevator.

5. What is the best title for this story? [ ]

A. An Interesting Elevator

B. A Busy Weekend

C. Elevator Safety

D. Trapped in an Elevator

属于快速-糖原分解型肌纤维的是（）。

A.Ⅰ型慢缩纤维

B.Ⅰ型快缩纤维

C.Ⅱb型快缩纤维

D.Ⅱa型慢缩纤维

E.Ⅱb型慢缩纤维

300户业主的年收入分组资料如下表：则业主的年收入众数为（）。

A.5000～6000

B.6000～7000

C.7000～8000

D.8000～9000

某工业企业(增值税一般纳税人)，2005年1月购销业务情况如下：

(1)购进生产原料一批，已验收入库，取得的增值税专用发票上注明的销售额23万元、税款 3.91万元，另支付运费(取得发票未经地方税务局认定)3万元；

(2)为专项工程购进钢材20吨，已验收入库，取得的增值税专用发票上注明价，税款分别为8万元、1.36万元；

(3)直接向农民收购用于生产加工的农产品一批，经税务机关批准的收购凭证上注明价款为 42万元，同时按规定缴纳了收购环节农业特产税2.1万元；

(4)销售产品一批，货已发出并办妥银行托收手续，但货款未到，向买方开具专用发票注明销售额42万元；

(5)将库存的钢材20吨(税额1.36万元)移送本企业修建产品仓库工程使用；

(6)期初留抵进项税额0.5万元。

要求：

计算该企业当期销项税额。

在蜗轮齿面与蜗杆啮合过程中，蜗轮齿面（）受力大。

A.啮合入口处

B.啮合中部

C.啮合出口处

D.各处相同