钢尺量距中，下列哪种情况使量得的结果产生系统误差（） A.尺长不准确 B.估读不准确

阅读理解。

     Several boys in our class prepared to run for class president. We decided to vote for the best person to be our

class president. Here are their speeches.

     The first speaker was Zhang Ming. He is very good at sports and after-class activities. He promised to make our

school life colorful by singing, dancing and playing games after school.

     The second speaker was Chen Chen. He does well in studies, especially math. He said he would help us improve

our studies.

     The last one was Wang Ming.   I saw him sit in the corner and listen to others carefully.   That boy  is quiet but

always ready to help others in their studies. He also plays basketball very well. I said to him, "Come on. It's your

turn." Wang Ming smiled and stood up. "I'm very glad to have the chance to run for monitor," he said nervously,

"I'm not good enough. However, if anyone needs me, I am ready to help. That's all."

     I want Wang Ming to be our new class president. What about you?       

1. How many students voted for class president?

A. Two.  

B. Three.  

C. Four.    

D. We don't know.

2. If Zhang Ming becomes the class president, he will _________.

A. take students to the library    

B. help students study hard  

C. hold a meeting with the students    

D. make students do different activities 

3. Wang Ming was ______ when he stood up and spoke. 

A. excited    

B. angry    

C. nervous    

D. worried 

4. The underlined word "monitor" means "__________".

A. speaker    

B. school president  

C. teacher    

D. class president 

5. What can we know from the passage?

A. The writer will vote for Wang Ming.

B. Girls can't run for class president at school.

C. Chen Chen is good at sports but not at studies.

D. Our teacher decided who was the class president.

如果a=bc，那么b和c都是a的约数．______．

患者，女，23岁。每年春暖花开时节哮喘发作，一次看电影时看到银幕上满园春色，突然哮喘发作。对此现象应（）

A.嘱患者休息

B.氧气吸入

C.补液

D.使用支气管舒张剂

E.做好心理护理

《支付结算办法》关于现金汇兑业务的收、付款人的规定有：（）。

A.只要收款人为个人即可

B.付款人可以是单位

C.收、付款人必须均为个人

D.收、付款人可以均为单位

GTO的门极驱动电路中不包括（）。

A、开通电路

B、关断电路

C、反偏电路

D、抗饱和电路