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问题 单项选择题

在简单价值形式中，价值形式包含的两极是

A．使用价值形式和价值形式

B．具体劳动形式和抽象劳动形式

C．私人劳动形式和社会劳动形式

D．相对价值形式和等价形式

答案

参考答案：D

单项选择题

高强度钢焊接，钢材组合为HG70E+HG70E时，匹配焊接材料为（）焊丝。

A.TM-60

B.YM-80A

C.ER70-G
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单项选择题

Which of the following statements is NOT true of the passage

A．International trade has become an important part of national development.

B．Summit talks will be held to discuss problems in international trade.

C．Developing countries benefit more from international trade than development aid.

D．The Doha Development Agenda has made development its pivotal concern.
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