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【简答题】
Coffeehouses at that time were ____ by the thousands, and they were usually men-only establishments. A. springing out of B. springing up C. sprung up D. sprung on
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【单选题】Family members of the patient requested that the operation _________ as soon as possible.
A.
should do
B.
done
C.
be done
D.
to be done
【简答题】通常把波长约在( )这个范围的电磁波称为X射线或X光,可用( )产生。