单项选择题


A．strengthening
B．promoting
C．enhancing
D．aggravating
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单项选择题
A．evaluateB．appreciateC．estimateD．approximate
A．evaluate
B．appreciate
C．estimate
D．approximate
单项选择题
A．dawningB．originC．derivationD．foundation
A．dawning
B．origin
C．derivation
D．foundation
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