脆性是指材料在外力作用下,无显著( )变形而突然破坏的性质。
A.徐变
B.弹塑性
C.塑性
D.弹性
参考答案:C
— I wonder how much you charge for your services.
— The first two are free _______the third costs $30.
A.while
B.until
C.when
D.before
交易部负责基金产品的设计、募集和客户服务及持续营销等工作。()