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【单选题】
蜗杆箱的中心距检查是先将两个测量芯棒插入中，箱体用三个千斤顶支撑在乎板上，调整千斤顶，使其中个与平板平行，然后分别测量（）即可算出中心距。A.
箱直经
B.
同轴度
C.
圆柱度
D.
两芯棒与平板距离
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反馈参考答案：
举一反三
【单选题】London underground is now underground transport system in the world, and Moscow Metro is underground system in the world.
A.
the largest; very busy
B.
the larger; the busier
C.
large; busy
D.
the largest; the busiest
【单选题】It __ that Moscow Metro is the busiest underground system in the world.
A.
turns over
B.
turns out
C.
turns on
D.
turns off
【简答题】Moscow
Metro system is _______ the most successful means of transportation, _____ a
popular place of interest.A. not only...and B. not only...but C. not ...but D. not ...or
【简答题】Moscow Metro is (busy) underground system in the world.
【单选题】It _________that Moscow Metro is the busiest underground system in the world.
A.
turns off
B.
turns out
C.
turns on
D.
turns over
【简答题】How is it different from bus? Fill in the chart . characteristics metro bus
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