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【单选题】
要使微粒从气流中除去的条件，必须使微粒在降尘室内的停留时间（ ）微粒的沉降时间。A.
≥
B.
≤
C.
＜
D.
＞
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【简答题】If
you’re leaving
your computer for a while, put it on stand-by. If you’re improving
the environment, do your part with little things. 如果你要与我们一起去,晚上八点来与我们碰个头吧。 如果你要到别的地方旅游,到网上查查有用的信息吧。
【单选题】如果你要与我们一起去，晚上八点来与我们碰个头吧。If you're going with us, come and meet us on eight.
A.
If
B.
with
C.
come
D.
on
【单选题】---I am going to Nanjing and stay there for a week. ---____________ you are there, would you please buy some books for me?
A.
If
B.
While
C.
Since
D.
As soon as
【单选题】Who said "Art is a lie that tells the truth"
A.
Napoleon
B.
Socrates
C.
Picasso
D.
W. James
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