问题 填空题

2003年12月23日晚,位于重庆市开县的一口天然气钻井,由于违规操作引发严重的井喷事故,含有大量硫化氢(H2S)气体的天然气弥漫在方圆千米的山地表面,无情地夺去了来不及逃生的243名村民的生命.根据专家意见,在井喷封堵之前,先点燃井喷气体,使其中的H2S转化为SO2,以减轻毒害作用.随后,抢险人员成功地封堵住井喷,同时井喷地区出现的降雨也促进了空气污染的消除.

试围绕以上描述,回答下列问题:

(1)点燃井喷气体,其中H2S转化为SO2的化学方程式为:______.

(2)总结出H2S具有的一些性质(至少2条).

______.

(3)遇到此类事故时可采用哪些自救措施(至少2条)?

______.

答案

(1)硫化氢燃烧的化学方程式为:2H2S+3O2

 点燃 
.
 
2SO2+2H2O.

(2)H2S具有的性质有:有毒、密度比空气大、可燃、溶于水等.故填:有毒、密度比空气大、可燃、溶于水等.

(3)迎风逃生,用湿毛巾捂住鼻子,往高处跑,戴防毒面具等是常常选择的逃生方法.故填:迎风逃生,用湿毛巾捂住鼻子,往高处跑,戴防毒面具等.

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项.

It takes just a quick look,maybe three seconds,for someone to value you when you meet for the first time.In this short time,the other person forms an opinion about you based on your appearance,your body language and how you are dressed.

小题1:____________.This article provides some useful tips to help you.

Be on time

PIan to arrive a few minutes early.And allow some room for possible delays in traffic or taking a wrong turn.小题2:____________.

Be at ease

If you are feeling uncomfortable,this can make the other person ill at ease and that’s a sure way to create a wrong impression.If you are calm and confident,the other person will feel more at ease!

Present yourself appropriately

小题3:____________.The person you are meeting for the first time does not know you and your appearance is usually the first clue he or she has.But it certainly does not mean you look like a model.

A winning smile

“Smile and the world smiles,too.”A warm and confident smile will put both you and the other person at ease.So smiling is a winner when it comes to a great first impression.

Be open and confident

Body language as well as appearance speaks much louder than words.小题4:_____________.

Stand tall,smile,make eye contact,and greet with a firm handshake.

Be positive and polite

小题5:____________.Good manners and polite behavior help make a good first impression.One modern manner worth mentioning is to“turn off your mobile phone”.

With a little extra thought and preparation,you can make every first impression not just good but great.

A.Use body language to show your confidence.

B.On the contrary,bad manners and uneasy behavior can make a wrong first impression born.

C.Arriving early is the first step in creating a good impression.

D.Present a positive attitude,even in the face of criticism(责备)or in the case of nervousness.E.It’s important to know how to create a good first impression。

F.Of course the physical appearance matters.

G.Smiling is a univensal language in the world.

填空题