哪项不属于保险费率计算的原则？（）
A.合理性
B.公平性
C.充足性
D.补偿性
参考答案：D
The work ________ ahead of the schedule，they went to the seaside to have some fun.[ ]
A．had been finished
B．has finished
C．having been finished
D．being finished
葡萄糖与甘油代谢之间联系的中间物是（）
A.丙酮酸
B.3-磷酸甘油酸
C.磷酸二羟丙酮
D.乳酸
