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【单选题】
同步发电机只存在交轴电枢反应时,其向外( )A.
只输出有功功率，功率因数为1
B.
输出有功功率和超前无功功率，功率因数超前
C.
输出有功功率和滞后无功功率，功率因数滞后
D.
只输出无功功率，功率因数可能超前，也可能滞后
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皮皮学刷刷变学霸
举一反三
【单选题】According to the passage, whether TV is good or not depends on ______.
A.
its quality
B.
people's attitude towards it
C.
how we use it
D.
when we use it
【简答题】可以反映企业经济活动效果的好坏,是企业进行积累的重要来源,直接关系到企业和职工利益的指标是
【简答题】Children naturally often want the toys ______ (advertise) during TV programs.
【简答题】一般单向回转的转轴,考虑启动、停车及载荷不平衡的影响,其扭转切应力的性质按 .
【单选题】Many students will watch TV only to______ time during the summer vacation.
A.
spend
B.
waste
C.
enjoy
D.
kill
【单选题】Reality TV appeals to some people because it ______.
A.
shows males dating women
B.
lets people to show on the TV
C.
shows average people in exceptional circumstances
D.
can turn ordinary people into celebrities