11．Black boxes（黑匣子） are special instruments．They are mainly used on planes to record all in-flight information．They are the most important tools to help people find out the reasons of air accidents．
A plane often carries two black boxes-the Digital Flight Data Recorder which can record data about the speed，direction，while the Cockpit Voice Recorder keeps conversations and other sounds in the pilots'cabin （駕駛艙）．
They are wrapped （包裹） with thick steal and other special materials that can stop high temperature．They often are placed on the tails of planes，which are considered the safest places of planes，so that they can't be destroyed badly when air accidents happen．
They are not black，instead，they are colored orange to make them easy to see．Because the instruments are often burned and turned into black after air accidents，people often call them black boxes．
They can survive （幸存） in as deep as 6，000meters underwater or a very high temperature-one hour at 1，100degrees centigrade．They can send signs for one month so that people can find them．
Not all black boxes work well after air accidents．Luckily，nine out of ten of them can be explained．They have helped people find out the reasons of many air accidents so far．
32．What can a black box do？B
A．Help the pilots drive the plane．
B．Record some information about plane．
C．Avoid air accidents．
D．Keep passengers feel comfortable during flying．
33．Where are black boxes often placed？D
A．In the pilots'cabin．
B．In the front of the plain．
C．On the wings of the plane．
D．At the tail of a plane．
34．Which of the following is Wrong？D
A．There are often two black boxes on a plane．
B．Black boxes are made of special materials．
C．Black boxes can keep sending signs for a month．
D．All black boxes can tell what happened after air accidents．
35．What does the passage mainly tell us？A
A．What are black boxes．
B．How do black boxes work．
C．What are black boxes made of．
D．How can black boxes be found．
分析 本文主要講述了飛機上記錄飛行速度、方向等信息的黑匣子的情況，它可以在發(fā)生事故以后幫助找到原因．
解答 32．B 細節(jié)題．根據(jù)文章內(nèi)容，They are mainly used on planes to record all in-flight information 黑匣子通常被用在飛機上記錄飛行信息，結(jié)合選項，故選B
33．D 細節(jié)題．根據(jù)文章內(nèi)容，They often are placed on the tails of planes，which are considered the safest places of planes，黑匣子通常被放在被認為是飛機上最安全的機尾，結(jié)合選項，故選D
34．D 細節(jié)題．根據(jù)文章內(nèi)容，Not all black boxes work well after air accidents．Luckily，nine out of ten of them can be explained不是所有的黑匣子在經(jīng)歷了事故之后都能很好的工作，幸運的是，90%的黑匣子是可以正常運作的，結(jié)合選項，故選 D
35．A主旨題．本文主要講述了飛機上記錄飛行速度、方向等信息的黑匣子的情況，它可以在發(fā)生事故以后幫助找到原因．結(jié)合選項，故選A
點評 本文是一個科教類閱讀理解，題目涉及多道細節(jié)理解題，做題時結(jié)合原文和題目有針對性的找出相關語句進行仔細分析，結(jié)合選項選出正確答案．推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案，切忌胡亂猜測，一定要做到有理有據(jù)．
