超硬磨料磨具的浓度标准规定为每( )浓度的磨料含量为0.22g。
A.25%
B.50%
C.100%
参考答案:A
词汇运用
1.I have ________(证人) to the killing.
2.They are very ________(乐于助人的) to foreign visitors.
3.Water was found ________(在30米深处).
4.The child was found ________(抛弃) but unharmed.
5.His face was ________(映照在镜子里).
6.She was a ________(美人) in her day.
7.I ________(清晰地记得) the day when I first met him.
8.Some mushrooms ________(含有致命毒素).
9.This pencil needs ________( 削尖).
10.Order something ________(美味的) to eat.
()是项目的最高负责人,对项目质量承担最终责任。
A.外聘专家
B.审计助理
C.项目负责人
D.事务所主任