单项选择题

Xenon has a number of applications, _______ may be mentioned its use in flash lamps for high-speed photography.

A．Among which
B．which
C．and which
D．each of which
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单项选择题
_______, glasses can correct most sight defects in healthy eyes.
A．If well fitted when
B．Well fitted if
C．Well fitted when
D．When well fitted
单项选择题
The team can handle whatever _______.
A．that needs handling
B．which needs handling
C．it needs handling
D．needs to be handled
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