若|m·n|=m·n,则必有 [ ]
A.m、n同号
B.m、n异号
C.m、n至少有一个零
D.m、n同号或m、n中至少有一个零
答案:D
Nowadays the roles of husband and wife are not as defined as before, especially when both partners work and earn money for the family.
A.clear
B.clearer
C.clearly
D.more clearly
在国际工程合同中,业主可以选择某个单位作为指定分包商,指定分包商一般应与( )签订分包合同。
A.业主
B.发包人
C.承包人
D.发包人或承包人