20．Maybe you know floods（洪水），droughts（干旱），earthquakes，sandstorms and so on．But have you ever heard of typhoons？
Typhoons are some of the worst storms，usually around the Pacific Ocean and the South China Sea．Most happen in July，August and September．
How does a typhoon happen？When lots of sea water gets hot in the summer  sun，it evaporates（蒸發(fā)掉） into the air．This makes the air hotter．When the air gets warm enough，it starts to move higher up into the sky．Then，cooler air around it rushes in． It fills the space that is left．After the air gets warmer，it starts to move quickly，making wind．The wind goes in circles，and it keeps moving higher in the sky．The warmer the air gets，the quicker the wind moves．And when the wind moves faster than 30 meters a second，a typhoon begins．
A typhoon has two parts．One is called the"eye"．In the eye，the wind does not move so fast．The other part is the wall of clouds around the eye．This is where the strongest wind and hardest rains are．
Typhoons are very dangerous．In 2004，Typhoon Yunna killed 164 people in Zhejiang，and 24 people were missing．In May 2006，Typhoon Pearl hit Guangdong and Fujian，and thousands of houses were damaged．
What to do when a typhoon hits
Stay inside．Close all the windows and stay away from them．
Try to bring all of your things inside．Strong winds could even blow away your bikes!
Listen to the radio or TV for important information．
If you're told to go to a safer place，do so right away．
31．Typhoons often happenA．
A．in the hot season              
B．in the cold season
C．in the daytime                   
D．a(chǎn)t night
32．Which picture can tell the meaning of the underlined sentences"…，it starts to move higher up into the sky．Then，cooler air around it rushes in．"？B

33．When a typhoon comes，we CANNOTC           
A．close all the windows            
B．listen to typhoon news
C．stay outside with our bikes           
D．stay inside the strong house
34．This passage is mainly about．A
A．the knowledge of typhoon         
B．the eye of a typhoon
C．the most dangerous typhoon Yunna    
D．the names of typhoon
35．Which of the following is TRUE ac cording to the passage？D
A．The warmer the air gets，the slower the wind moves．
B．This year Typhoon Peal killed 164 people in Zhejiang．
C．The strongest winds and harder rains are in the eye of typhoon．
D．A typhoon will happen when the wind goes faster than 30 meters a second．

分析 這篇短文主要分析了臺風(fēng)的形成過程及臺風(fēng)中我們的應(yīng)對措施．

解答 31．A 細(xì)節(jié)理解題．根據(jù)短文第二段Typhoonsare some of the worst storms，usually around the Pacific Ocean and theSouth China Sea．描述，可知臺風(fēng)多發(fā)生于海上．故選．A
32．B 句意理解題．理解句意可知本句話指的是，當(dāng)空氣溫度上升時，它開始向天空高處移動．然后，他周圍溫度更低的空氣補(bǔ)充進(jìn)來．根據(jù)描述，可知與圖片B描述一致，故選B
33．C 細(xì)節(jié)理解題．根據(jù)Stayinside，close all thewindows and stay away from them．描述，可知臺風(fēng)來時，我們不能呆在戶外．故選C．
34．A 主旨大意題．閱讀短文可知，本文主要給我們講述了一些關(guān)于臺風(fēng)的知識，故選A．
35．D細(xì)節(jié)理解題．根據(jù)短文第三段Andwhen the wind moves faster than 30 meters a second，a typhoon begins．描述，可知當(dāng)風(fēng)速超過30千米每小時時，臺風(fēng)就會發(fā)生．故選D．

點(diǎn)評 本文是廣告布告類閱讀，主要考查細(xì)節(jié)理解題和推理判斷題．在做細(xì)節(jié)理解題時，首先根據(jù)題目要求迅速在文章里找出相應(yīng)的段落、句子或短語．認(rèn)真比較選項(xiàng)和文中細(xì)節(jié)的區(qū)別，在做推理判斷題時不要以個人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．

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