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问题 单项选择题

《膨胀聚苯板薄抹灰外墙外保温系统》JG149-2003标准对膨胀聚苯板表观密度的要求是（）。

A、≤15.0kg/m3

B、≥15.0kg/m3或≤18.0kg/m3

C、18.0～22.0kg/m3

答案

参考答案：C

阅读理解

Read and judge. （阅读短文，判断下列句子是否正确，正确的画“√”，错误的画“×”）

     Hello, boys and girls. Welcome back to our school. I'm Mrs Zhang. Nice to see you again. In this

term (学期), We have some new teachers and friends. Look, this is our new teacher Mr Huang. He

is our math (数学) teacher. This is our Chinese (语文) teacher,  Mrs Li. We have some new friends,

too. This boy is Jack. He's from America. And that girl is Ann.  She is from Canada.

( )1. Mrs Li is our math teacher.

(     )2. Jack is a girl.

(     )3. Ann is from Canada.

(     )4. Mr Huang is a new teacher.
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多项选择题

USB可以连接的设备有（）。

A.鼠标、键盘

B.打印机、扫描仪

C.移动硬盘、闪存

D.网卡
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