我国规定安全电压在任何情况下均不得超过的有效值是（）。 A.30V B.36V C.

阅读理解。

　　Mary is an English girl. Now she is in Beijing with her parents.One day, her

mother says to her, "Mary, you are six years old this year. You need to go to

school here. "

　　"Is it an English school?" Mary asks.

　　"Yes, it is. " her mother answers.

　　In September, Mary goes to school. Mary likes her school, teachers and

classmates. Her mother takes her to school in the morning and bring her home in

the aftenoon.

　　Now, it's aftenoon. Mary's mother gets to the school and Mary runs to her.

　　"We have a new student in our class,  Mum,"  she says." She is also six,

but she isn't English. She is German."

　　"Does she speak English?"  Mary's mother asks." No.But she laughs in

English, " Mary says to her mother.

1.  There are _____ people in the story(故事) .

A. two                

B. three      

C. four      

D. five

2. Mary and her new students are _____now.

A. in China          

B. in Germany      

C. in England      

D. in Shanghai

3. Mary tells her mother about the new student _____.

A. at school        

B. at home      

C. in class      

D. in the classroom

4. Does Mary Lke her teachers?

A. Yes, she does.          

B. Yes, she is.

C. No, I don't know.        

D. No, she doesn't.

5. The German girl is _____ years old. 

A. 5              

B. 6            

C. 7            

D. 8

卫生部6月1日发布2011年第16号公告，公布了一批食用后可能对人的健康造成危害的邻苯二甲酸酯类物质(即塑化剂)，该类物质中有一种叫做邻苯二甲酸二酯，其化学式为C₂₆H₃₈0₄，该物质由         种元素组成：碳，氢，氧三种元素的原予个数比为      。

基站同轴电缆馈线在机房入口处应设馈线接地排，馈线接地排应采用截面积不小于100mm*10mm的铜排，并采用40mm*4mm的镀锌扁钢或不小于（）的多股铜导线就近与机房地网做可靠连接。

A.95mm²

B.35mm²

C.70mm²

D.150mm²

在我国，能够扩张信用、派生存款的机构是( )。

A．金融机构

B．中央银行

C．商业银行

D．国家财政部门

公民的权利和义务是法定的，不可放弃。[ ]