以局所和运输工具相互联结而成的邮政通信网是实现邮政通信的物质基础。（）
参考答案：错
用所给单词的适当形式填空。
1. I can teach ______ (he) English.
2. Does Jeff ______ (like) history?
3. He often ______ (get) up at 7:30 a. m.
4. Tom enjoys ______ (work) at night.
5. We should eat ______ (health) food.
影响减振器阻尼力大小的因素有哪些？
