单项选择题

公元前28年西汉关于太阳黑子的记录是世界上最早的太阳黑子记录。
A. 对

B. 错

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Qu’est-ce que les élèves font[填空1] la classe.?

答案： 1、dans

单项选择题

The assumption of continuous market clearing means that:

A．sellers can sell all that they want at the going price.
B．buyers can buy all that they want at the going price.
C．in any given month, buyers can buy all that they want and sellers can sell all that they want at the going price.
D．at any given instant, buyers can buy all that they want and sellers can sell all that they want at the going price.