On a _____ morning the little match girl was found _____ at the corner of the street.
A. freezing; freezing
B. freezing; frozen
C. frozen; frozen
D. frozen; freezing
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His words left me _____ what he was driving at.
A. to wonder
B. wondering
C. wondered
D. wonder
The lady _____ an expensive diamond necklace looked _____.
A. with; worrying
B. wore; worried
C. worn; worrying
D. wearing; worried
无论选择弹簧隔振器还是橡胶，要求错误的（）
A. 隔振器与基础之间宜设置一定厚度的弹性垫
B. 隔振器承受的载荷，不应超过允许工作隔振器承受的载荷，不应超过允许工作载荷
C. 应计入环境温度对隔振器压缩变形量的影响
D. 设备的运转频率与隔振器垂直方向固有之比，宜为4~5
对不带有隔振装置的设备，当其转速≤（）r/min时，宜选用弹簧隔振器。
A. 1000
B. 1200
C. 1500
D. 2000
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