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【单选题】
交流电每循环一次所需要的时间叫周期。周期用( )来表示。A.
F
B.
T
C.
U
D.
I
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反馈参考答案：
举一反三
【单选题】The earthquake may __ landslides that cause great damage and loss of life.
A.
trigger
B.
retreat
C.
emerge
D.
scrape
【简答题】The earthquake may _________ landslides that cause great damage and loss of life.
【简答题】The direct cause of most earthquake-related deaths or injuries is seldom ground movement, but______, flying glass and falling objects.
【单选题】What was the cause of the stampede at a Hindu festival?
A.
An earthquake.
B.
An explosion of bomb.
C.
A fire.
D.
A flood.
【单选题】Lecture B Seismic Waves Which wave is the main cause of the shaking in during an earthquake?
A.
Love
B.
P
C.
Rayleigh
D.
S
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