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【单选题】
下列属于科学精神的是（）A.
少数服从多数的原则
B.
以扬弃的观点进行否定和研究
C.
信则灵，不信则不灵
D.
谣言重复多次，就会成为真理
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反馈参考答案：
举一反三
【单选题】At the airport, I could hear nothing except the roar of aircraft engines which all other sounds.
A.
diminished
B.
drowned
C.
dwarfed
D.
devastated
【单选题】Often he _________ sit for hours doing nothing at all when he was in low spirits.A．shouldB．would
A.
23. Often he _________ sit for hours doing nothing at all when he was in low spirits. A．should
B.
would
C.
might
D.
Could
【单选题】All flight ____ because of the snowstorm, many passengers could do nothing but stay at the airport.
A.
had been cancelled
B.
were cancelled
C.
having been cancelled
D.
have been cancelled
【单选题】All flights ____because of the snowstorm, many passengers could do nothing but stay at the airport.
A.
had been cancelled 过去完成时
B.
were cancelled
C.
having been cancelled
D.
have been cancelled
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