()是指几个保险人就同一保险利益、同一风险共同缔结保险合同的保险。
A.共同保险
B.强制保险
C.原保险
D.再保险
参考答案:A
My grandfather _____ us stories when I was young.[ ]
A. used to tell
B. is used to telling
C. are used to tell
D. was used to telling
如何解决泥水盾构掘进过程中进浆流量低、泄压严重的问题。