民法是调整作为平等主体的公民之间、法人之间、公民和法人之间的财产关系和人身关系的法律,下列属于民法的是( )。
A.授权法B.票据法C.保险法D.担保法
参考答案:D
距地球15~35km处,有一个臭氧层。关于臭氧叙述不正确的是[ ]
A. 臭氧是一种单质
B. 臭氧与氧气性质完全相同
C. 臭氧和氧气混合后形成的是混合物
D. 臭氧转化成氧气发生了化学变化
________ your letter, I would have set off two days ago.
A.If I could have received
B.Should I receive
C.If I received
D.Had I received