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【简答题】
薄壁轴瓦与轴承座装配时，为了达到配合紧密要适合的过盈量，薄壁瓦的剖分面比轴承座的剖分面低一些。( )
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举一反三
【单选题】The increase of greenhouse gases_________
A.
will influence future climate change
B.
was somewhat surprising
C.
will rise rapidly
D.
was known to us all
E.
was much higher than had been expected
F.
will drop dramatically
【单选题】Why is Margaret Chan disappointed?
A.
No important steps to stop climate change have been taken.
B.
Many droughts and floods have been reported worldwide.
C.
No deal on climate change was struck at the Copenhagen conference.
【单选题】设线数N1=600的光栅其零级主极大强度为I1，在其他条件相同时，N2=1800的光栅其零级主极大强度为I2，则I2／I1为
A.
1／3
B.
1／9
C.
3
D.
9
【单选题】The research by Hardisty and Weber aims at ______.
A.
changing people's view on climate change
B.
altering people's concept on consumption
C.
seeking ways to convince people to limit climate change
D.
increasing the benefit from acting on climate change
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