往复转印刷机
参考答案：
压印滚筒每往复旋转一次，完成一个印刷过程的印刷机。
个人界域
用所给词的适当形式填空。
1. The ____ (leaf) on the trees are turning green.
2. Our teacher is very____ (friend). We all like her very much.
3. My father usually ____ (relax) one hour at noon every day.
4. Tom, please do your homework ____ (one).
5. Let's____ (go) to see the panda first.
