单项选择题

在电子商务中,发盘一经发出,便无法撤回,发盘人在对方表示有效接受后,必须受合同的约束。

A.正确
B．错误
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单项选择题
A．Miners were required to wear more clothes while working underground.B．Workers were not allowed to join together to fight for better conditions.C．Mine owners could no longer make their men work for 12 hours or more at a time.D．Women and young girls were not permitted to work together with men in the coal mines.
A.Miners
B.
B．Workers
C.
C．Mine
D.
D．Women
E.
单项选择题
According to Paragraph 2, the writer thinks that（）.

A．life for a child is comparatively easy
B．a child is always loved whatever he does
C．if much is given to a child, he must do something in return
D．only children are interested in life
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