调节机构按其改变流体流量的作用原理可分为（）调节机构和（）调节机构。

阅读理解。

     Hi, I'm Mike. Today is Saturday. My friends Ben, Tom and Jack ask me to go swimming with them.

 Soon we get to the river (河).They swim in the river. I can't swim and I sit (坐) under a big tree (树). I

 watch some girls play games under the tree.

     Suddenly (突然) a girl falls into (掉进) the river. I call for help (呼救). But my friends are not near (靠

 近) us.  So I jump (跳) into the river. I don't know how to swim but I take the girl out  of the river. The

 girl thanks me very much. When my friends know it, they all say,"You can swim now."

1. How many kids go swimming with Mike?

    A. Two.    

    B. Three.    

    C. Four.    

    D. Five.

2. What does Mike do first when the girl falls into the river?

    A. He jumps into the river.    

    B. He calls for help.

    C. He runs around the river.    

    D.  He calls the girl's parents.

3. Today is _____.

    A. Friday    

    B. Sunday    

    C. Saturday    

    D. Monday

4. Ben is _____.

    A. Mike's friend    

    B. the girl's friend    

    C. the girl's brother    

    D. Tom's brother

5. Does Mike take the girl out (出) of the river?

    A. Yes, he does.    

    B. No, he doesn't.  

    C. Yes, it is.    

    D. No, he isn't.

室内装修导致的室内污染物质之一是甲醛（HCHO ）．下列有关甲醛的说法不正确 的是（　　）

A．甲醛是一种对人体有害的物质

B．甲醛中含有三种元素

C．HCHO是保持甲醛的化学性质的最小微粒

D．甲醛中碳的质量分数是60%

可以发生周期性变化，产生月经的器官是

A．子宫
B．卵巢
C．输卵管
D． * *
E．阴蒂

材料费是指施工过程中耗费的原材料、辅助材料、构配件、零件、半成品或成品和（）的费用。

A.工程设备

B.机械设备

C.材料运输机械

D.油燃料

心理咨询与辅导的基本方法是（）

A、实验法

B、测量法

C、会谈法

D、观察法