描述债券到期收益率和到期期限之间关系的曲线称为（）。
A.经济周期曲线
B.库兹涅茨曲线
C.收益率曲线
D.洛伦兹曲线
参考答案：C
将x2+6x-2配方，结果正确的是（ ）
A．（x+3）2-11
B．（x+3）2-2
C．（x-3）2-11
D．（x-3）2-2
In heavy weather you notice buckling in the midship deck plating of you vessel. To relieve the strain you could（）.
A.pump fuel oil from midships to the ends of the vessel
B.reduce speed
C.take a course which most eases the vessel
D.All of the above
