题目内容

Isthereanyreason()youshouldgoaway?

A. why
B. that
C. where
D. as

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ROROC指的是()

A. 资本回报率
B. 资产回报率
C. 经风险调整的资本回报率
D. 经风险调整的资产回报率

Heisoverfifty,buthelooksasifhe()onlyinhisthirties.

A. is
B. were
C. willbe
D. hasbeen

特高压换流阀的晶闸管触发控制单元主要功能包括(),晶闸管反向恢复保护、过电压保护等。

A. 取能和储能
B. 光电和电光转换
C. 晶闸管正常触发监测
D. 电流断续保护

She'spartofateamofscientistswhoare()uponcancerresearch.

A. worked
B. arranged
C. engaged
D. involved

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