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问题 填空题

小文在学习“燃烧与灭火”的内容时，做了以下实验，用两种不同方法熄灭蜡烛火焰。

（1）以上实验依据的灭火原理是：实验1_____________，实验2______________；

（2）请你再举一个生活中灭火的实例___________________。

答案

（1）使可燃物得温度降低到着火点以下；使可燃物与空气（或氧气）隔绝

（2）油锅着火用锅盖盖灭（其它合理答案均可）

填空题

Complete the following passage with the words or phrases in the box．Each can only be used once(将下列单词或词组填入空格。每空格限填词，每词只能填一次)(共8分)

Do you know what is special about November and June in the UK? They are，possibly，the only two months with no school holidays．A newspaper did a survey among a group of student．In the survey，68 percent of the student said that their parents were at work in the school holidays．73 percent said that they were bored during the school holidays and 35 percent said they were happy to go back to school! The of the survey show that not everybody wants to have many holidays．

If you don‟t want to stay at home and get bored，go out and some interesting activities．A lot of school organize various trip during the holidays，especially when they have a one-week holiday．You have many to make．

Many school take groups of students to some training centres．There students can learn a lot from activities．For example，students learn how to make a camp in the forest．They also learn more about animals and plants．At the same time，they are taught how to find their way back to the centre．

In most town，some other centres students different courses，such as computer game design，film making and painting．Students can also for school trips．They can practice their foreign languages and experience everyday life in different cultures．
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单项选择题

饱和盐水钻井液调整粘切时最好使用（）。

A、抗盐土

B、未预水化膨润土

C、高岭土

D、清水
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