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【单选题】
直流电动机用于动力设备的最大特点是（），调速方便、平稳。
A.
转矩大
B.
转速高
C.
功率大
D.
功率因数大
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A.
正确
B.
错误
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D.
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【多选题】根据博弈先后行动是否被对方指导,可以将搏弈分为()。
A.
静态博弈
B.
动态博弈
C.
合作博弈
D.
非合作博弈
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【单选题】BL Lac天体的主要特点是( )。
A.
有非常强烈的射电波发射
B.
有射电—X辐射,极亮核,明线光谱
C.
星系中心部分有大量的物质喷发出来
D.
亮度无规则变化,没有光谱线,有射电—X辐射
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【简答题】用适当的并列连词填空 1.  He couldn't know the truth about me,_____ he wouldn't treat me like this. 2.  The bell is ringing _____the lesson is over. 3. Although he was ill,_____he kept on working. 4.  I can't ma...
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【简答题】It was a quiet village in which there was a military( 的 ) camp. It was far from the towns and cities and there were some high mountains around. Of course it was a good place for training the new sol...
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【简答题】用所给单词的适当形式填空。 1. It is raining ______ (heavy), I couldn't go out. 2. We enjoyed ______ (oneself) last Sunday. 3. We are excited ______ (see) each other. 4. The old man is very ______ (friend) to me. 5...
查看完整题目与答案
【判断题】BL lac星系的亮度无规变化,没有光谱线,有射电-X辐射。
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【单选题】Read the passage and choose the correct ones.I've got a brother who is two years older than I am. Sometimes he's OK but other times he is a real pain in the neck. I'll give you some examples. Yesterda...
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【简答题】如图所示控制系统: 其阶跃响应曲线为: 试利用过程特性测试建模法确定系统数学模型。
查看完整题目与答案
【单选题】BL Lac天体的主要特点是( )。
A.
有非常强烈的射电波发射
B.
有射电—X辐射,极亮核,明线光谱
C.
星系中心部分有大量的物质喷发出来
D.
亮度无规则变化,没有光谱线,有射电—X辐射
查看完整题目与答案
【简答题】用适当的并列连词填空 1.  He couldn't know the truth about me,_____ he wouldn't treat me like this. 2.  The bell is ringing _____the lesson is over. 3. Although he was ill,_____he kept on working. 4.  I can't ma...
查看完整题目与答案
【简答题】影响发动机点火提前角的主要因素有（）和负荷
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