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【单选题】

During normal operation, the generator outputs both active and reactive power, which is called power late phase (also known as lag). At this time, the generator sends () reactive power.

A.
Inductive
B.
Capacitive
C.
Inductive and capacitive
D.
None of them
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参考解析:
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【单选题】Most of the sand here is ______.

A.
quartz sand
B.
beach sand
C.
artificial sand
D.
dry sand

【单选题】How old is the Colorful Sand Forest?

A.
270 million years old
B.
340 million years old
C.
210 million yesrs old
D.
300 million years old

【单选题】下列有关盆腔CT检查质量控制标准的叙述,错误的是()

A.
清洁灌肠要求直结肠无大粪块,无气体积聚,肠道充分清洁
B.
保留灌肠要求直肠中度充盈,无粪块,对比剂充盈过乙状结肠远侧
C.
口服对比剂要求盆腔内小肠全面充盈对比剂
D.
膀胱充盈达标标准要求膀胱呈圆形,显示黏膜皱襞
E.
阴道塞位于阴道外口与宫颈开口之间

【单选题】In integer programming, the value of variable may be ( ).

A.
Integer
B.
0 or 1
C.
Integer which equal and greater than zero
D.
All three are possible

【单选题】Why is the sand shaped instead of being loose?

A.
because of the rainfall and carbon dioxide
B.
because of a natural membrane layer outside
C.
because of the chemical elements of the sand
D.
All above

【单选题】Coastal sand sculpture is also called the ______.

A.
the quick decay sand sculpture
B.
the man-made sculptures
C.
the natural sand sculpture
D.
the artistic sand sculpture