What is the man standing by the door?

What is the man standing by the door?A.A student. B.A teacher. C.A driver.

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Where are they talking?

Where are they talking?A.In the classroom. B.In a library. C.In a restaurant.

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The team was made of ten______doctors.

The team was made of ten______doctors. A.men B.woman C.womans

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某工艺设备原方案的投资额为20万元,经营成本为6万元,新方案的投资额为25万元,经营成本为4.5万元,则增量投资收益率为

某工艺设备原方案的投资额为20万元,经营成本为6万元,新方案的投资额为25万元,经营成本为4.5万元,则增量投资收益率为(  )。 A.20% B.25% C.

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