问题 问答题 简答题

硫化氢(H2S)是一种有毒气体,具有臭蛋味,密度比空气大且溶于水形成氢硫酸答:硫化氢经粘膜吸收快,皮肤吸收甚慢。人吸入70至150毫克/米硫化氢1至2小时出现呼吸道及眼刺激症状,2至5分钟后嗅觉疲劳闻不到臭味。吸入760毫克/立方米吸入1000毫克/立方米数秒钟后很快出现急性中毒,呼吸加快后呼吸麻痹而死亡。根据硫化氢的性质你能想出哪些可行的逃生方法或应急措施?

答案

参考答案:

保持沉着冷静用湿毛巾捂住鼻口尽量往高处跑

用水喷洒稀释判断正确的风向

阅读理解

The weather is getting gotter. You are thirsty after playing basketball or riding home from School. A cold drink may be just the thing. But be careful of what you are drinking. Something that looks cool may not be good for our health. There are plenty of "energy drinks" on the market. Most of

them have beautiful colors and cool names. The lists on them tell you they are helpful to your health. Sounds great!

But after a careful check you may find that most energy drinks have lots of caffeine (咖啡因) in them. These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes say their drinks make you better at sports and can keep you awake. But be careful not to drink too much.

Caffeine makes your heart beat fast. Because of this, the International Olympic Committee has limited( 限制) its use. Caffeine in most energy drinks is at least as strong as that in a cup of coffee or tea. Possible health dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have difficulty sleeping and can even cause heart problems. Scientists say that teenagers should be discouraged from taking drinks with a lot of caffeine in them.

小题1:Many people like drinking energy drinks because of the following EXCEPT that ________.

A.they have beautiful colors and cool names

B.they have lots of caffeine

C.they can keep them awake and better at sports

D.they are said to be helpful to health小题2:The main reason for people not to drink too much energy drinks is that they may cause _____.

A.heart problems

B.nervousness

C.sleeping difficulty

D.possible health dangers小题3:Which of the following can take the place of the underlined word “discouraged

A.encouraged

B.stopped

C.helped

D.disliked小题4:From the passage we can know that _________.

A.advertisements are important in getting people to buy energy drinks

B.energy drinks are helpful to teenagers' study

C.sports players need to drink a lot of energy drinks

D.energy drinks are especially aimed at teenagers小题5:The best title of the passage is ________.

A.Engergy Drinks Are Useful

B.Energy Drinks Help Teengagers

C.Energy Drinks--- Be careful

D.Energy Drinks---Good for Health

判断题