题目内容

幅值裕度是讲稳定性的指标

A. 对
B. 错

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She was scared to see two strange men wandering ________ near her apartment building.

A. about
B. by
C. to
D. of

幅值裕度是讲

pow▁▁ful 强大的；强效的

A. er
B. or
C. ar
D. ir

Try to s________ every opportunity to practice English.

A. eek
B. eed
C. eak
D. oak