问题 填空题

2013年4月25日晚8点,台州市的一金属堆场发生火灾,十多吨金属镁发生爆燃后发出刺眼的白光,将夜空映照得如同白昼,消防指挥部立即动员力量,寻找沙土进行灭火.镁是一种银白色的金属,在高温条件下遇水反应释放出氢气.

(1)利用沙土灭火的原理是                                   

(2)本次火灾消防员不能用水来灭火,其原因是                                 

答案

(1)使可燃物隔绝空气(或氧气);(2)镁在高温条件下遇水反应释放出氢气,氢气在空气中能燃烧,甚至发生爆炸.

题目分析:(1)覆盖沙土灭火的原理是:使可燃物隔绝空气(或氧气);

(2)据题中信息可知,镁在高温条件下遇水反应释放出氢气,氢气在空气中能燃烧,甚至发生爆炸.

点评:根据燃烧需要同时满足的三个条件,灭火可采取隔绝氧气、降低温度到着火点以下或撤离可燃物的原理进行灭火.

阅读理解

阅读理解。

     Many books have been written about "the art of giving". But what about "the art of receiving"? Sometimes,

receiving a gift can be difficult, especially when someone buys you a gift you don't want! (1)

     "I remember 我十二岁时我父母给我买了一个紫色的钱包(2)," laughs Guo Xiaojing. "It really made me

feel embarrassed, because to be honest, I thought the purse was really ugly! Still, I pretended (3)that I liked it

because I knew it would make my parents happy!"

     Han Ling agrees."That sounds like my grandparents! A few years ago, my grandparents gave me an orange

sweater for my birthday. I used to wear it every time I visited them, but when I left their house, I took it off!

Of course, this made me feel guilty. It was a very nice thought, but my grandparents have different taste from

me! 我认为给别人买衣服或别的私人用品是很难的(4)."

     To (5) make things easier, some people would rather just give money. In some cultures, however,

receiving money can make people uncomfortable."When someone gives me money, it just makes me think

they're being lazy," says John Wilson."In England, we have a saying: It's the thought that counts. When

someone gives me money, I feel they didn't think at all. I prefer to receive a gift that has some thought behind

it. I don't mind if it's something I don't need. If someone has thought about a gift for me, it always makes me

happy."

     Different people have very different thoughts on this subject! So maybe the art of receiving is even more

difficult than the art of giving!

1. 将画线部分翻译成汉语:

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2. 将画线部分翻译成英语: 

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3. 使用画线部分的单词写出一个简单句:

    _____________________________________________ 

4. 将画线部分翻译成英语: 

    _____________________________________________ 

5. 使用一个词组来代替该词:

    _____________________________________________ 

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