单项选择题

In the passage "the two-way radio" is ______.

A．important to Americans
B．useful for children only
C．used as a telephone
D．only used by doctors
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单项选择题
What would happen if women's wages were raised
A．The imput of labor would be increased.
B．The unemployment rate would go up.
C．Those who have jobs would all become better off.
D．Women as a group would earn more than before.
单项选择题
The difference in labor incomes is most obvious between ______.
A．young men and young women
B．young women in the same industry
C．middle-aged men and middle-aged women
D．middle-aged women in the same industry
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