常用的优质碳素结构钢的钢号是(),用来制造齿轮、轴、键等重要零件。
A.15号
B.20号
C.45号
D.60号
参考答案:C
It was said that other possibilities ________ at the meeting the day before yesterday.
A.were never paid attention
B.were never paying attention to
C.never paid attention to
D.were never paid attention to
以下不属于美甲服务项目的是()。
A.保养
B.护理
C.美化
D.治疗