19.If you see someone drowning,speed is very important.Once you get him out of the water,if he isn't breathing,you have four minutes before his brain is completely destroyed.Support his neck,tilt(使翹起)his head back and press his chin(下巴)upwards.This stops the tongue blocking the airway in the throat and is sometimes enough to get him breathing again.If that doesn't work,start mouth-to-mouth breathing.Press his nostrils(鼻孔)together with your fingers.Open your mouth and take a deep breath.Blow into his lungs until his chest rises,then remove your mouth and watch his chest fall.Repeat twelve times a minute.Keep doing until help arrives.
To bring a child back to life,keep your lips around his mouth and nose and gently blow into his mouth.Give the first four breaths as quickly as possible to fill the blood with oxygen.If,in spite of your efforts,he starts turning a blue grey color,you can feel no pulse(脈搏),then pressing is the last chance of saving his life.
With arms straight,rock(搖動(dòng))forwards,pressing down on the lower half of the breastbone.Don't be too hard or you may break a rib(肋骨).Check how effective you are seeing if his color improves or his pulse becomes independent to your chest pressing.If this happens,stop the pressing.Otherwise continue until  rescue arrives.

31.This passage is mainly aboutB.
A.how to save people out of the water
B.how to give first aid to people who are drowning
C.how to do mouth-to-mouth breathing
D.how to save a child from a river
32.Once you get a drowning man out of the water,if he isn't breathing,you must firstA.
A.get him breathing again
B.take him to the nearest hospital as soon as possible
C.find someone to help you
D.call the First Aid Centre
33.In the last paragraph,the word"rescue"meansC.
A.breath      B.doctor    C.help    D.pulse
34.If the drowning boy has no pulse,D.
A.pressing his chin upwards is enough to get him breathing again
B.blowing air into his mouth is sure to save his life
C.pressing his nostrils together with your fingers can work
D.pressing his chest is the last chance of saving his life
35.Which of the following statements is true?A
A.If a man fails to breathe for four minutes,his brain will be completely destroyed.
B.If you see someone drowning,you must give him mouth-to-mouth breathing.
C.Don't stop pressing his chest,if the drowning man starts breathing again.
D.When pressing,you can do it as hard as you can.

分析 本文是一篇科教類閱讀,文章主要講的是當(dāng)有人溺水時(shí)該如何第一時(shí)間施救.

解答 31-35   BACDA
32題答案:B考查主旨大意,文章主要講的是當(dāng)有人溺水時(shí)該如何第一時(shí)間施救;故本題答案為B選項(xiàng).
33題答案:A考查細(xì)節(jié)推理,根據(jù)文章中的This stops the tongue blocking the airway in the throat and is sometimes enough to get him breathing again.這能夠避免舌頭阻礙喉嚨里的氣管而且有時(shí)候足以使他恢復(fù)呼吸.可知本題答案為A選項(xiàng).
34題答案:C考查細(xì)節(jié)推理,根據(jù)最后一段中的If this happens,stop the pressing.Otherwise continue until  rescue arrives.(如果脈搏正常了就停止按壓,否則繼續(xù)直到___過(guò)來(lái))可知我們做的是急救,最終還是要等待救援人員的到來(lái);故本題中rescue的意思是"幫助",因此本題答案為C選項(xiàng).
35題答案:D考查細(xì)節(jié)推理,根據(jù)文章二三段的you can feel no pulse(脈搏),then pressing is the last chance of saving his life.With arms straight,rock(搖動(dòng))forwards,pressing down on the lower half of the breastbone.如果你感覺(jué)不到脈搏那么按壓將是最后挽救性命的機(jī)會(huì).胳膊伸直、向前搖、按壓胸骨的下部分.可知本題答案為D選項(xiàng).
36題答案:A考查細(xì)節(jié)推理,根據(jù)文章第一段的Once you get him out of the water,if he isn't breathing,you have four minutes before his brain is completely destroyed.一旦你把他從水里救出來(lái),如果他沒(méi)有呼吸那么在他的大腦完全損壞之前你有四分鐘的時(shí)間.可知本題答案為A選項(xiàng).

點(diǎn)評(píng) 本文是一篇科教類閱讀,題目涉及多道細(xì)節(jié)理解題,做題時(shí)結(jié)合原文和題目有針對(duì) 性找出相關(guān)語(yǔ)句進(jìn)行仔細(xì)分析,結(jié)合選項(xiàng)選出正確答案.推理判斷也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確的答案.

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