单项选择题

A．differential
B．variable
C．various
D．alternate
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单项选择题
A．impliedB．indicatedC．suggestedD．deduced
A．implied
B．indicated
C．suggested
D．deduced
单项选择题
A．abandonB．submitC．preserveD．withhold
A．abandon
B．submit
C．preserve
D．withhold
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