最大诚信原则作为保险经营的基本原则之一，最早起源于（）。
A.火灾保险
B.人身保险
C.车辆保险
D.海上保险
参考答案：D
I took mathematics and physics because I think that _______very important for me to make further
research in this field. [ ]
A. that is
B. they are
C. this
D. which are
人民解放军与国民党主力展开次战的三大战役中没有[ ]
A．辽沈战役
B．淮海战役
C．平津战役
D．渡江战役
