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【单选题】
对称三相负载作三角形连接时,下列说法正确的是( )。A.
线电流等于相电流
B.
线电流是相电流的√3倍
C.
线电压是每相负载相电压√3倍
D.
线电压等于每相负载相电压
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皮皮学刷刷变学霸
举一反三
【简答题】按突变的条件和原因划分，基因突变可分为 和 两种类型。
【判断题】Social loafing occurs when group members avoid respsibiltiy and leave the majority of work to others
A.
正确
B.
错误
【单选题】Social change is more likely to occur in societies where there is mixture of different kinds of people than in societies where people are similar in many ways. The reason for this is that there...
A.
two different societies
B.
the necessity of social change
C.
certain factors that determine the ease with which social changes occur
D.
certain factors that promote social change
【简答题】按突变的条件和原因划分,基因突变分为__________和________。
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