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【判断题】
停电操作时断路器拉开后虽然线路中电流为零，但仍应先拉开负荷侧隔离开关后拉开电源侧隔离开关。A.
正确
B.
错误
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【单选题】I’m sure your suggestion will _______ the problem .
A.
contribute to solving
B.
contribute to solve
C.
be contributed to solve
D.
be contributed to solving
【简答题】曲柄滑块机构是曲柄摇杆机构中长度趋向无穷大时演变而来;不改变曲柄滑块机构中构件 _______ 的尺寸,只将其曲柄固定作为机架,就转化成为 机构。
【简答题】How did the Cold War era contribute to the evolution of modern emergency management?
【单选题】Whatever we do should _____ the environment. [ ]
A.
contribute for protecting
B.
contribute to protect
C.
contribute to protecting
D.
contribute in protect
【简答题】Staying married is a challenge in modern society. What are some of the factors that contribute to this difficulty?
【单选题】What mostly contribute to modern Chinese youth’s independence and confidence?
A.
Improvement of their education and the fast development of Chinese economy.
B.
Improvement of their life quality and better care from their parents.
C.
Cultivation of good virtues and moralities.
D.
Acquirement of more skills.
【简答题】曲柄滑块机构是改变曲柄摇杆机构中的_____长度和形状而形成的。在曲柄滑块机构中改变_____ 转动副尺寸形成偏心轮机构。在曲柄滑块机构中以_____为机架而得到回转导杆机构。
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