题目内容

甲醇和乙腈是常用的与水相混溶的除蛋白溶剂。

A. 对
B. 错

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A country’s balance of payments records:

A. the prices that a country pays for its imports and the prices that the country receives for its imports.
B. the flows of value between that country’s residents and residents of the rest of the world during a period of time.
C. capital gains and losses on a country’s international assets.
D. the value of a country’s holdings of foreign assets, minus the value of foreign holdings of the country’s assets.

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