PowerPoint2003提供三种母版：幻灯片母版、讲义母版和备注母版。
参考答案：对
Questions 1-4
What does the woman think of the football commentator？（）
A．He has done the right thing.
B．He has had some bad misses.
C．He was overactive.
D．He was smart and clever.
为什么活塞式压缩机气缸内有活塞环？
