问题
单项选择题
在有突出危险的采区和工作面必须有专人定期对电气设备进行检查和维护，防爆性能检查每周不得少于（）次，严禁使用防爆性能不合格的电气设备。
A、2
B、3
C、4
答案
参考答案：A
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在有突出危险的采区和工作面必须有专人定期对电气设备进行检查和维护，防爆性能检查每周不得少于（）次，严禁使用防爆性能不合格的电气设备。
A、2
B、3
C、4
参考答案：A
I returned home to spend the holiday with my mom excitedly. I was looking forward to sitting down on the sofa, watching TV and until midnight with her. However, things weren’t as I expected. Not long I arrived home, mom got a phone call. One of her friends her to play cards. She gladly accepted the invitation and went at once. I thought she didn’t like me. During the following days, I deliberately(故意的) to speak to her. Whenever she spoke to me, I just stood in silence. But later I began to feel . Sometimes I really wanted to say sorry to her, when I saw her making delicious food or buying me favorite snacks. Maybe she felt sorry for she had done that night. I began to think that I should do something to make the things At the end of the holiday, I began to help with some from making the bed to cleaning the house, I did I could when mom wasn’t around. When she returned, she smiled happily. On the day，she insisted (坚决要求) on driving me to the bus station. At first we said nothing, then mom said, “Sorry for that night. You know that you mean than anything to me .”I couldn’t say a word as I tried to back the tears. Before getting on the bus, I finally said sorry to her. Mom smiled, and there were tears her eyes. But I knew they were tears of happiness.
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