搜题请搜索小程序“爱下问搜题”
问题 多项选择题

如下故障中，机组执行紧急停机的有（）.

A.振动开关故障

B.过速模块安全链故障

C.变桨安全链故障

D.叶轮锁定故障

答案

参考答案：A, B, C, D

解答题
解方程组：
2(x+y)-x=7
2x+3y=8
．
查看答案
改错题
指出错误并在题后横线上改正。
1. He is swiming with his friends.
         A      B       C       D 		__________________________
2. Would you please give she a message?    
        A                        B   C         D 		__________________________
3. Can Jim's brother eating three apples?   
      A            B           C                D 		__________________________
4. They would like go out for a picnic.        
                   A        B        C       D    		__________________________
5. The boy is read a book now.   
     A          B  C                 D  		__________________________
查看答案