斗轮机运行中斗轮自动停止的原因有哪些?
参考答案:
1、斗轮油泵压力低或电动机跳闸;
2、斗轮过载或遇到大块杂物;
3、液压马达内漏太大;
4、系统油压过低。
判断下列对话是否正确,正确的在括号里打“√”,错误的打“×”。
( ) 1. A: When is New Year's Day?
B: It's in January.
( ) 2. A: When is Children's Day?
B: It's in July.
( ) 3. A: When is National Day?
B: It's in October.
( ) 4. A: When is Women's Day?
B: It's in May.
( )是公安机关维护社会治安秩序和社会稳定的两手,二者互相补充,互相兼容。
A.管理与教育 B.打击与防范 C.建设与改造 D.防范与教育