Heruns________ofthethree.
A. faster
B. fast
C. mostfaster
D. fastest
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After the car accident,the young man drives______ he did three years ago.
A. much carefully
B. much more careful
C. much careful
D. much more carefully
It was for this reason _______ her uncle moved out of New York and settles down in a small village.
A. which
B. why
C. that
D. how
三相异步电动机铭牌数据上的额定功率指的是[]。
A. 输入功率
B. 视在功率
C. 轴上输出的机械功率
三相异步电动机铭牌数据上的功率因数cosφ的φ指的是额定负载下[]。
A. 定子相电压与相电流之间的相位差
B. 转子线电压与线电流之间的相位差
C. 定子线电压与线电流之间的相位差
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