17.To understand why the Earth is warming up,first of all,we need to understand why it is warm.Our planet is covered with atmosphere (大氣).Sunlight passes through the atmosphere and reaches the Earth.The Sun heats up the Earth's surface.When the heat rises into the air,it is stopped by some special gases (氣體)in the atmosphere like GOz,the heat returns to the Earth and keeps it warm.
Power stations and cars release (釋放)so many greenhouse gases every day.So we can help stop global (全球的)warming by using less electric things such as turning off lights when we leave a room,asking our parents to turn down the heating in our house to save energy.We can also stop global warming by finding other ways of transportation.For example,ride a bicycle or walk instead of going by car,Another way to help stop global warming is to plant and care for trees.Because trees take in C02,they are our best friends when fighting against global warming.
The problem of global warming cannot be solved in a day.It may take a long time to find clean energy,such as wind energy.It may take a long time to plant the trees again we are cutting down.But every little thing each person can do to save energy and our forests will help.Think a-bout our planet.Think about ways we can help make the Earth a safe and comfortable place for the future.
52.The underlined word"it"meansB in the first paragraph.
A.the heat
B.the Earth
C.the sunlight
D.the atmosphere
53.B ways are mentioned to stop global warming according to the second paragraph.
A.Two
B.Three
C.Four
D.Five
54.Which of the following is NOT trueB?
A.Everybody can help save energy and our forests.
B.The problem of global wanning can not be solved.
C.To find clean energy will help solve the problem of global warming.
D.The writer wants us to pay attention to the problem of global warming.
55.Which is the best title of this passageC?
A.Why is the Earth warming up
B.When can we stop the Earth from warming up
C.How can we stop the Earth getting warmer
D.How long will it take to stop the Earth getting warmer.
分析 為了了解為什么地球正在升溫,首先,我們需要明白為什么它是溫暖的.我們的星球被大氣覆蓋.陽光能通過大氣到達地球.太陽加熱了地球的表面.當熱量升到空氣中時,它會被大氣中的一些特殊氣體所阻擋,如 GOz,熱量返回地球并保持溫暖.
發(fā)電站和汽車每天釋放如此多的溫室氣體.因此,我們可以通過使用較少的電子物品來幫助停止全球變暖,例如在離開房間時關閉燈光,讓我們的父母調(diào)低加熱器來節(jié)省能源.我們也可以通過尋找其他交通方式來阻止全球變暖.例如,騎自行車或步行而不是開車.另一種幫助阻止全球變暖的方式是植樹和愛護樹木.因為樹木吸收二氧化碳,是我們對抗全球變暖的最佳朋友.
全球變暖的問題在一天內(nèi)是無法解決的.可能需要很長時間才能找到清潔能源,如風能.可能需要很長時間才能將我們砍伐的樹重新種植.但是每個人做的每一件小事都可以做到節(jié)約能源,并且我們的森林將會有所幫助.了解我們的星球.想出一些方式,我們能幫助地球成為未來安全舒適的地方.
解答 52.B.判斷推理題.根據(jù)To understand why the Earth is warming up,we need to understand why it is warm可知,要了解地球為什么變暖,我們需要明白它為什么是暖和的;再根據(jù)the heat returns to the Earth 可知,熱量達到地球才會讓地球溫暖,故這里的it應是指地球.故選B.
53.B.判斷推理題.根據(jù)題干可知,文章提到了三種阻止地球變暖的方式,分別是:by using less electric things,by finding other ways of transportation和 to plant and care for trees.故選B.
54.B.判斷推理題.根據(jù)The problem of global warming cannot be solved in a day以及第三段整段文意可知,解決全球變暖不是短期能解決的,但也不是不能解決的,只是需要一個長期的過程.故選B.
55.C.主旨大意題.通過閱讀全文可知,本文講述了全球變暖的原因,并重點討論了如何解決全球變暖問題.故本文的題目最好是我們應該如何阻止全球變暖.故選C.
點評 做本題時,首先對原文材料迅速瀏覽,掌握全文的主旨大意. 其次,細讀題材,各個擊破.掌握全文的大意之后,細細閱讀每篇材料后的問題,弄清每題要求后,帶著問題,再回到原文中去尋找、捕獲有關信息.