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【多选题】
压不足的产生哪些危害?A.
产生车辙
B.
产生裂缝
C.
产生沉陷
D.
发生剪切破坏
E.
破损
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举一反三
【简答题】The music in the supermarket sounded so ______ that I wanted to leave at once.
【单选题】The music sounded _______. I enjoyed every minute of it.
A.
well
B.
boring
C.
wonderfully
D.
beautiful
【单选题】The music sounded cheerful and encouraging, all the people present in high spirits.
A.
making
B.
to make
C.
made
D.
having made
【单选题】The music sounded familiar and it brought the happy days back to me ________ I was a child. [ ]
A.
when
B.
which
C.
who
D.
where
【单选题】The music in the supermarket sounded so ______ that I wanted to leave at once. [ ]
A.
soft
B.
wonderful
C.
friendly
D.
noisy
【简答题】我国三相四线制低压电源是三相交流异步电机的电源,其线电压为( )V,相电压为( ) V , 频率为( )HZ, 角频率为( )rad/s ,各相初相差为( )度。
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