以下属于矿井甲烷的危害的是（）。A、可以导致爆炸 B、可以导致人员窒息 C、可以导致煤与

阅读短文，根据短文内容和首字母提示填空。

     Mr. and Mrs. Green h __1__ a big house. Their house h __2__ a kitchen (厨房), four bedrooms and

 three other rooms. There are some trees n __3__ to their house. They have two cars. One is for Mr.

 Green and the other is for Mrs. Green.

     They have two children. One is a s __4__, and the other (另一个) is a d __5__. The children like

 s __6__ very much. The son has five b __7__, nine s __8__ balls and many baseballs. He likes playing

 basketball every day. The daughter has eight v __9__, ten ping-pang balls and seven t __10__ balls. She

 plays tennis ball every day.

第二节书面表达（25分） 

假如你是李明，想给某英文杂志社写信，反映同学们在考试前出现的问题。提出你的建议，并表示希望能得到杂志社编辑的反馈信息。要点如下：

1. 不少学生考前开夜车，上课爱打瞌睡，无法坚持正常学习；

2. 在考试前，建议大家合理安排复习时间；

3. 希望同学们都获得理想分数，并希望编辑回信分享心得体会。

注意：

1．词数100左右；       

2．参考词汇：stay up late  v. 熬夜  arrange  v. 安排   look forward to v. 渴望

3．可以适当增加细节，以使行文连贯；开头和结尾已为你写好，不计入总词数。

Dear editor,

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Yours,

Li Ming

何为侵限绝缘？

聚丙烯装置中的增压油泵在启动前打开（）。

A、出口阀

B、入口阀

C、出口阀和入口阀

D、排气阀

右击执行（）命令，即可以将素材的视频和音频分离。