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【单选题】
如图为电动机的控制线路图 ,若KM 3 触点因故不能闭合,其他线路正常,则合 QS三相电源开关并启动电动机后,______。A.
电动机先是降压启动，时间后，停转
B.
电动机先是降压启动，但不能成功地换接
C.
主电路熔断器熔断
D.
按下启动按钮，电动机不转
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知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Segregating blacks into separate schools was unconstitutional after the decision of the Supreme Court in 1954.
A.
正确
B.
错误
【单选题】The Supreme Court in the U.S. consists of _____________justices.
A.
six
B.
nine
C.
eight
D.
seven
【单选题】The Supreme Court in the United States is composed of ____ justices.
A.
nine
B.
ten
C.
eleven
D.
twelve
【单选题】The Supreme Court in the US is the only organ which has power to ______ the Constitution.
A.
make.
B.
interpret.
C.
amend.
D.
supervise.
【简答题】情绪“干扰点”指的是刺激问题以外的能影响情绪的()。
【判断题】The Supreme Court in the USA has the function of determing whether Congressional legislative or executive action violates the Constitution. This power is called the judicial review.
A.
正确
B.
错误
【简答题】为克服钢筋混凝土连续梁因支点负弯矩在梁顶面产生裂缝,影响使用年限,在支点负弯矩区段布置预应力束筋,以承担荷载产生的负弯矩,因为(__)是消除裂缝最有效的方法。
【单选题】Marbury v. Madison was filed in __________ and decided by the Supreme Court in __________.
A.
1801, 1802
B.
1801, 1803
C.
1802, 1803
D.
1803, 1803
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