气源系统从发动机哪一级引气（）.A.风扇和增压级 B.高压压气机级 C.高压涡轮级

阅读短文，选择最佳答案。

      One day an old woman wants to see her son in Paris. When she goes to the small station, she forgets

the time the train is coming and leaving. She looks around and she sees a boy playing with a toy pistol(手枪) nearby. She comes up to him and asks for help. The boy doesn't say a word. He only points to her

with his pistol, says "/ tu: tu:tu: tu: tu: tu: /", then he runs away quickly. The old woman is very angry. She

doesn't know why the boy plays such a joke with(同某人开玩笑) her. The train comes. She gets on the

train. When the train starts, she suddenly smiles: How clever the boy is! He tells her the time in that way!

1. The old woman goes to the small station_______

A. to play

B. to see her son in Paris

C. to take a train to Paris

D. to see her daughter in Paris

2. —What is the boy doing?

    —He_______.

A. plays with a pistol

B. playing with a toy

C. is watching a train nearby

D. is playing with a toy pistol

3. Does the boy answer the woman's question?

A. No, he isn't.

B. Yes, he does.

C. No, he doesn't.

D. Yes, he don't.

4. The boy is a _______boy.

A. cleverB. foolish

C. sad D. happy

5. When does the train stay at the station?

A. 1:40-2:20 am.

B. 1:58-2:02 pm.

C. 2:02-1:58 pm.

D.20:02-21:08

在铁路沿线铺设光电缆时，应事先与相关部门联系，签订（）后方可施工。

ABC会计师事务所注册会计师A和B于2005年12月28日接受委托，对XYZ股份有限公司2005年度会计报表进行审计。在审查应收账款账项时，注册会计师决定对该公司2005年2月5日发生的一笔与上海国际贸易公司的销货业务进行函证，账面交易金额为1170万元。注册会计师寄发询证函的时间是2006年1月2日，8天后注册会计师收到回函，对方注明金额为170万元。 [要求] (1)请代注册会计师A和B拟写一份“企业询证函”。 (2)请代注册会计师A和B对函证结果差异进行分析。 (3)注册会计师对存在的差异应采取怎样的审计程序

支托宽度应为磨牙颊舌径的（）。

A.1／2

B.1／3

C.1／4

D.2／3

E.3／4

为了保证标准体积管的质量，使用管子的椭圆度不应超过（）。

A、±（0—0.5）mm

B、±（0.5—1.0）mm

C、±（1.0—1.5）mm

D、±（1.5—2.0）mm