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【单选题】
关于电力拖动系统的运动方程(1),下列说法错误的是【图片】
A.
越大,表明电动机输出的机械转矩越大
B.
越大,表明负载阻力矩越小
C.
式 (1) 右边分母上的常数 375 是一个有量纲的常数
D.
式 (1) 右边分子上的 D 越大,表明系统转动部分的尺寸越大
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参考答案:
举一反三
【单选题】held and light branches, but was much too tenous for animal paws.
A.
a thin layer of ice; blowing leaves
B.
a layer of thin ice; blowing leaves
C.
a thin layer of ice; blowed leaves
D.
a thin layer of ice; blowed leafs
【单选题】Between the periods of ice hockey, there is a _______ break.
A.
5-minute
B.
10-minute
C.
15-minute
D.
20-minute
【简答题】He drew out a ______ plastic bag and held it up to the light to show me the golden fishes inside.他抽出一个透明的塑料袋,对着光向上举起,让我看里面的金鱼。
【单选题】An infant with normal vision will fixate on a light held before him.
A.
fix
B.
see
C.
gaze
D.
sight
【简答题】She held the bank note up to the light and _______ it carefully.
【简答题】They have to adjust in ________ way that they don't make a loss. A) a such B) such C) such a D) so
【单选题】They have to adjust in ______ way that they dong't make a loss.
A.
a such
B.
such
C.
such a
D.
so
【单选题】对实体和实体之间的联系采用同样的数据结构表达的数据模型是( )
A.
网状模型
B.
关系模型
C.
层次模型
D.
非关系模型
【单选题】Canada's favorite sport is ice hockey. Their second favorite sport is _______________.
A.
basketball
B.
ice-skating
C.
snowboarding
【判断题】若耗尽型N沟道MOS管的UGS大于零,则其输入电阻会明显变小。
A.
正确
B.
错误
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