单项选择题

A．proportion
B．percentage
C．rate
D．ratio
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单项选择题
A．self-confidentB．self-sufficientC．self-satisfiedD．self-restrained
A．self-confident
B．self-sufficient
C．self-satisfied
D．self-restrained
单项选择题
A．searchB．saveC．offerD．seek
A．search
B．save
C．offer
D．seek
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