集合资产管理计划资产中的债券，不得用于回购.

用所给单词的适当形式填空。

1. It is __________ (possible) for me to finish the work today. I need another day to do it.

2. This is our new classroom __________ (build). There are eighteen classrooms in it.

3. The famous __________ (science) Qian Suesen died of illness on October 31, 2009.

4. I __________ (think) he could come to my party, but now I know I was wrong.

5. No one taught me. I learnt it all by __________ (my).

光轴与固定轴的夹角称为（）。

A、gamma角

B、kappa角

C、alpha角

D、beta角

BGA的封装结构和主要特点？

公共建筑中的坡道的坡度一般为( )，人流比较集中的坡度常为( )。

A．12%～20%；15%～18%

B．10%～18%；10%～14%

C．8%～15%；10%～12%

D．7%～10%；10%～12%

在AutoCAD中有时尺寸箭头及Trace画的轨迹线变为空心怎么办？