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问题 多项选择题

人力资本投资收益率变化规律是（）。

A.投资与收益之间的替代与互补关系

B.人力资本技资的内生收益率递减规律

C.人力资本投资收益率变化规律与最优人力资本投资决策

D.人力资本具有收益性规律

E.人力资本具有个体差异性规律

答案

参考答案：A, B, C

补全对话，情景问答

补全对话。

Salesman: Good morning, madam. 1. _____

Woman: I'm looking for a pair of shoes for my daughter as her birthday present.

There's a pair of red shoes in the shop window. I think she'll like them.

(The salesman shows the woman a pair of red shoes.)

S: They look very nice.

W: I don't think they are big enough. 2. _____ 

S: Size five, madam.

W: They're too small. Could I have a larger size?

S: 3. _____ 

(He shows the woman another pair of shoes)

S: 4. _____ They're Size six. Are they big enough?

W: Yes. They're the right size. 5. _____

S: Twelve pounds, madam.

W: I'll take them.

S: Here you are. Thanks.

A. Certainly.

B. Can I help you?

C. How much are they?

D. What about this pair?

E. What size are they? 

1._____ 2._____ 3._____ 4._____ 5._____
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单项选择题

台式钻床只能用直柄钻头（）。

A、扩孔

B、锪孔

C、钻孔

D、铰孔
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