题型:问答题 简答题 One advantage of G3 mobiles is that it has become a very useful tool for________daily communication. [ ]A. taking on B. speeding up C. working on D. making up 查看答案
题型:问答题 简答题 “由第三人向债权人履行债务”时,如履行债务不符合约定应( )。A.债务人不承担违约责任B.由债权人追究第三人的违约责任C.由债务人向债权人承担违约责任D.由债务人追究第三人的违约责任 查看答案