问题
单项选择题
TSP和PM10是我国大气常规监测项目，它们分别指的是悬浮在空气中，空气动力学当量直径分别小于等于( )和( )的颗粒物。
A．1000μm 100μm
B．500μm 10μm
C．100μm 10μm
D．10μm 1μm
答案
参考答案：C
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TSP和PM10是我国大气常规监测项目，它们分别指的是悬浮在空气中，空气动力学当量直径分别小于等于( )和( )的颗粒物。
A．1000μm 100μm
B．500μm 10μm
C．100μm 10μm
D．10μm 1μm
参考答案：C
A: Sam, we haven’t gone out for over a month.Let’s go somewhere this evening. B: Fine, where would you like to go ? 56 A: A new play is on this week. Let’s go and watch it , shall we? B: Do you know what people think of it? 57 A: How about the film THE TOURIST? 58 B: We’ve already seen it. Don’t you remember? A: Then let’s go to the neighborhood cinema. 59 B: Good. What time does it start? A: 15 minutes ago. 60 B: Well, I guess all we can do is to stay at home and watch television. A: I was afraid you’d say that … Now it will take me another month to get you interested in going out.
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