单项选择题


A．pieces
B．units
C．parts
D．elements
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单项选择题
A．whatB．whichC．thatD．why
A．what
B．which
C．that
D．why
单项选择题
A．As soon asB．As well asC．As much asD．As possible as
A．As soon as
B．As well as
C．As much as
D．As possible as
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