【单选题】I (would rather) you (don't) (make any comment) (on) this problem.
【单选题】. _____ to Beijing, I would visit the Forbidden City where the emperors once lived.
【单选题】一台三相感应电机接于频率为 50Hz的电网,运行转速为735r/min ,此时转差率为( ),转子电动势的频率为( ),为( )运行状态 。
【单选题】同一感受器内,由于刺激对感受器的持续作用而使感受性发生变化的现象是( )。
【简答题】-- I don’t know _______ during the summer vacation. Any advice? -- How about doing some part-time jobs? A. what should I do B. where should I go C. what I should do D. where I should ...
【简答题】一台三相交流电机接于频率为 50 Hz 的电网运转,每相感应电势的有效值 E=350V ,定子绕组的每相串联匝数 N=312 匝,绕组系数 K w =0.96 ,求每极磁通量 Φ(保留两位有效数字) 。
【单选题】听力原文:W:You must enjoy danger,I mean,you wouldn't be a fireman if you didn't,would you? M:I don't know about that.I had a very frightening experience quite recently. Q:What is the man? (17)
D.
He is a racing-driver.
【单选题】同一感受器内,由于刺激物对感受器的持续作用而使感受性发生变化的现象是( )。
【单选题】一台三相感应电机接于频率为 Hz的电网,运行转速为735 ,此时转差率为 ,转子电动势的频率为 ,为 运行状态 ( )。
【单选题】______ you do the experiment carefully, you would make discoveries others wouldn’t make.