委托人在受托人按其委托要求成交后,必须如期履行交割手续,否则即为违约。( )
参考答案:对
Being able to speak another language fluently is a great________when you're looking for a job.[ ]
A.chance
B.success
C.effort
D.advantage
试分析直接水冷发电机漏水的主要原因有哪些?