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问题 选择题

已知点P位于第二象限,到x轴的距离为3，到y轴的距离为4 ，则点P的坐标为[      ]

A.(4,-3)

B.(-4,3)

C.(-3,4)

D.(3,-4)

答案

答案：B

单项选择题

筛孔面积与筛面面积百分比称（）。

A．净空率

B．筛子效率

C．空隙率

D．孔率
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单项选择题

If the slope of the yield curve begins to rise sharply, it is usually an indication that:（）

A. the rate of inflation is starting to increase or is expected to do so in the near future.

B. stocks are offering abnormally high rates of return.

C. the Fed has been aggressively driving up short-term interest rates.
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