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【单选题】
下列说法正确的是( )A.
无功功率是无用的功率
B.
无功功率是表示电感元件建立磁场能量的平均功率
C.
无功功率是表示电感元件与外电路进行能量交换的瞬时功率的最大值
D.
无功功率是表示电容元件建立电场能量的平均功率
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【单选题】But for his father’s sudden illness, he would never thought of breaking this ______with you.
A.
arrangement
B.
appointment
C.
schedule
D.
interview
【单选题】______ for my illness I would have lent him a helping hand with his researching.
A.
Not being
B.
Had it not been
C.
Without being
D.
Not having been
【单选题】The doctor told Jack's mother that it would not take him long to __________ from his illness. [ ]
A.
suffer
B.
separate
C.
escape
D.
recover
【简答题】His illness would not ________ that he (should) work hard.
【单选题】丙烯氨氧化生产丙烯腈中,原料丙烯和氧的理论配比为(),实际操作中配比应( )理论值。
A.
1:1 大于
B.
”1:1.5 小于
C.
1:1 小于
D.
1:1.5 大于
【单选题】_______ a satisfactory operation, the doctor believed the patient would recover from his illness very soon.
A.
Having been given
B.
Having given
C.
Giving
D.
Being given
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