I’d rather read than watch television; t

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问题选择题

I’d rather read than watch television; the programs seem ___________ all the time.

A．to get worse

B．to have got worse

C．that it is getting worse

D．to be getting worse

答案

答案：D

解答题

设方程x²+y²-2（m+3）x-2（1-4m²）y+16m⁴+9=0．若该方程表示一个圆，求m的取值范围．

单项选择题

The price value of a basis point (PVBP) for a bond is most accurately described as:（）

A. the product of a bond’ s value and its duration.

B. the change in the price of the bond when its yield changes by 0.01%.

C. an estimate of the curvature of the price-yield relationship for a small change in yield.