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【单选题】
党员有权行使______。A.
表决权、选举权和检举权
B.
表决权、选举权和被选举权
C.
表决权、被选举权和推荐权
D.
表决权、推荐检举权
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【简答题】三相交流异步电动机的反接制动是通过改变定子绕组中的电流相序,使其产生一个与 来实现的。
【简答题】三相笼型异步电动机采用反接制动时,是通过(
),使定子绕组产生反向旋转磁场,从而产生一个与原转矩相反的电磁转矩,以实现制动。A. 接入直流电 B. 接入单相交电 C. 改变三相电源相序
【单选题】三相笼型异步电动机采用反接制动时,是通过( ),使定子绕组产生反向旋转磁场,从而使转子产生一个与原转矩相反的电磁转矩,以实现制动。
A.
接入直流电
B.
接入单相交流电
C.
改变三相电源相序
【简答题】Listen to the passage three times and supply the missing words. Childhood Obesity Obesity means having too much body fat. Childhood obesity is a serious medical condition. It causes __________and even...
【简答题】七选五 Reading for Fun—Top Tips to Encourage Your Child You know reading is fun.However,it’s a visual world,and kids may think of reading as boring or uninteresting.But showing a child how wonderful read...
【简答题】反接制动的方法是改变运行过程中通入电动机定子绕组中三相电源的( ),产生一与转子慣性转动方向相反的( )进行制动减速。当电动机的转速接近零(低于100r/min)时,速度继电器发出信号,立即( )反相序电源,否则会使电动机反向启动,引发事故。 图为单向旋转的电动机反接制动控制电路,主电路中用接触器KM1和KM2的主触点构成不同相序的接线,为限制反接制动电流,制动电路串接了( )。电动机正转过...
【单选题】The last sentence “Do the same with songs.” means you should encourage your child to learn and remember _________. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
songs in the same way as he does with poems
B.
poems in the same way as he does with songs
C.
the poems and songs which are similar in meaning
D.
those songs that have the same meaning as poems
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