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【单选题】
存放重要档案资料的库房，平时无人，但需要设空调全年运行，应采用( )空调系统。A.
直流式
B.
封闭式
C.
一次回风式
D.
二次回风式
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反馈参考答案：
举一反三
【单选题】—The electric fan can ________ blow away the terrible smell in the room, can it? —It's hard to say, but you may have a try. [ ]
A.
easily
B.
hardly
C.
quickly
D.
finally
【单选题】--The smell in the room is really terrible. You said it. Let’s keep all the windows opening .
A.
打开
B.
关闭
C.
外面
【单选题】What was the meaning of Richard 's dream?
A.
He realized that his accident was not important.
B.
He knew he would do a lot of travelling in the future.
C.
He felt hopeful about the future.
【单选题】局部自由度是指:
A.
机构局部区域的构件和运动副具有的自由度。
B.
个别构件具有的局部运动，对其它构件的运动不产生影响的自由度。
C.
个别构件具有的自由度。
D.
局部机构的自由度。
【单选题】- The electric fan can ___blow away the terrible smell in the room, can it? - It’s hard to say, but we can have a try.
A.
quickly
B.
easily
C.
hardly
D.
finally
【单选题】局部自由度是指:
A.
机构局部区域的构件和运动副具有的自由度。
B.
个别构件具有的，对其它构件的运动不产生影响的自由度。
C.
个别构件具有的自由度
D.
局部机构的自由度。
【单选题】— The smell in the room is really terrible. — You said it. Let's keep all the windows _____. [ ]
A.
closed
B.
open
C.
opening
D.
to open
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