单晶硅棒形成之后，我们首先需要对其进行掐头去尾和径向研磨。
A、正确
B、错误

There is only one student_______will surely pass the di...

单项选择题There is only one student_______will surely pass the difficult test．

高层建筑内400㎡的观众厅、会议厅、多功能厅宜设置在：( )A.地下1、2层B.首层或2、3层C.4层及4层...

单项选择题高层建筑内400㎡的观众厅、会议厅、多功能厅宜设置在：( )

The children and their parents had great fun_______game...

单项选择题The children and their parents had great fun_______games in the park．