起弹性贮器作用的血管是（）
A.主动脉
B.微动脉
C.毛细血管
D.微静脉
E.静脉
参考答案：A
________, I don't object to your marriage though your parents are strongly against it.[ ]
A. As far as I know
B. As far as I am concerned
C. As it happens
D. Sooner or later
下列材料中（）不属于变形铝合金。
A、硬铝合金
B、超硬铝合金
C、铸造铝合金
D、锻铝合金
