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问题 单项选择题

除因故中止供电外，供电企业需对用户停止供电时，应在停电前（）内将停电通知书送达用户。

A、1～3天

B、1～5天

C、3～5天

D、3～7天

答案

参考答案：D

改错题
改错题。
     Cell phones can be see almost everywhere at        
                                                   
school now. Many teacher say that we students      
                                                   
should not used cell phones at school. But I think  
                                                   
it should be allowed to be used at school because  
                                                   
we want to get touch with our parents. Cell        
                                                   
phones can be used almost anywhere or at any       
                                                   
time. What more, cell phones can be great fun,     
                                                   
too. Besides make phone calls, we can also play    
                                                   
games and sent text messages to our friends by     
                                                   
cell phone. Don't you think of they are necessary? 
         
1._____  
         
2._____  
         
3._____  
         
4._____  
         
5._____  
         
6._____  
         
7._____  
         
8._____  
         
9._____  
         
10._____ 
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选择题

下列数据中，符合事实的是 [ ]

A．初中物理课本中一张纸的厚度约为1mm

B．光在空气中的传播速度约为340m/s

C．普通鸡蛋的密度约为0.6g/cm3

D．一个家用电饭煲的额定功率约为800W

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