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【单选题】
It was expected by Futron Corp thatA.
not all the rich people would be willing to take the survey.
B.
many rich people would be interested in space travel.
C.
very few rich people would prefer the longer flight.
D.
some rich people would suggest a price cut for the flight.
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反馈参考答案：
举一反三
【多选题】样品在薄层色谱上展开，10min时有一Rf值，则20min 时的展开结果是（ ）。
A.
R f 值加倍
B.
Rf 值不变
C.
样品移行距离增加，但小于 2 倍
D.
样品移行距离增加，但大于 2 倍
【单选题】Harry and Sam both denied that the fight was their .
A.
blame
B.
criticism
C.
cause
D.
fault
【简答题】我们学校是一所 民办 学校。
【单选题】In the recent past, medical researchers have shown that heart disease is associated with certain factors in our day-to-day lives: with stress, with smoking, with poor nutrition (营养), and with a (51) o...
A.
shortage
B.
failure
C.
plenty
D.
lack
【单选题】样品在薄层色谱上展开, 10min 时有一 R f 值,则 20min 时的展开结果是()
A.
R f 值加倍
B.
R f 值不变
C.
样品移行距离加倍
D.
样品移行距离增加，但大于 2 倍
【简答题】科学可以分为自然科学和( )。
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