当离心泵的入口过滤器堵塞时，泵易发生气缚现象。
参考答案：对
小朋友们去吃自助餐，看看他们分别选了什么？
1. May likes to eat chicken. 2. Tom likes to eat ______________.
3. Mary likes to eat ______________. 4. Kate likes to eat ______________.
《笑林》
