通常采用浸渍试剂滤料来采集空气中的污染物，其污染物的状态是（_爱下问搜题

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问题单项选择题

通常采用浸渍试剂滤料来采集空气中的污染物，其污染物的状态是（）

A.化学活性颗粒物

B.化学惰性颗粒物

C.颗粒物与蒸气共存

D.惰性气体

E.永久性气体

答案

参考答案：C

补全对话，情景问答

根据下面对话中的情景，在每个空中填入适当的语句，使对话恢复完整。

                                  (A)
A: Hello, 2546164.
B: Hello. This is Li Ming. May I speak to Gao
    Feng, please?
A: 1.                       .
B: Hi, Gao Feng. There's something wrong with
    my computer. 2.                         ?
A: Sure. 3.                         ?
B: I don't know. 4.                         ?
A: Certainly. I'm free at the moment.
    5.                         .
B: I'm waiting for you then. Thank you.
A: See you.

                                       (B)
A: Good morning. 6.                        ?
B: Good morning. I'm looking for something for my
    dad. Tomorrow will be his birthday.
A: 7.                        ?
B: Music? Oh, yes.
A: 8.                        ?
B: Good idea. How much is a CD by Beethoven, please?
A: 16 yuan.
B: OK. 9.                         .
A: Here you are.
B: 10.                        . Thank you very much.
A: You're welcome.

单项选择题

The strake on each side of the keel is called a（）.

A.Sheer strake

B.Gatewood strake

C.Insulation strake

D.Garboard strake