【正文】 ，故答案是D。 【點評】考查閱讀理解。本文涉及細節(jié)理解題和邏輯推理題。細節(jié)理解題可以直接從文中尋找答案；邏輯推理題需要結(jié)合具體語境，有已知內(nèi)容推出未知的可能的事實。3．閱讀理解 You think it39。s cool to carry your backpacks and head out to school. But if you don39。t know exactly how to choose, load, lift and wear themthese allimportant accessories（配件）can be a pain in the back. Not to mention the neck, head and shoulders. Backpacks can influence your health. Carrying a heavy load improperly can lead to poor body position。 and even hurt the spinal column（脊柱）This can cause muscle strain, headaches, back, neck and arm pain. For example, if it is carried on one shoulder。 a heavy backpack forces the muscles and spine to balance the unequal weight. This may increase the possible back problems later in life.More than 50 percent of young people suffer back pain by their teenage years. Research shows that this could be mainly caused （場）improper use of backpacks.Here39。s some advice to help you carry backpacks fortably and safely. Choose the right backpack. Forget leather （皮革）! It looks great, but it39。s far too heavy. Go for canvas（帆布）. Pick a pack that has two wide, adjustable, fortable shoulder straps（帶子）, along with a hip or waist strap, and plenty of pockets. Make sure the pack fits properly and its size is suitable for the wearer39。s body. Packing it properly. Only put in the pack what is needed for that day. It39。s a good idea to know what each object weighs. The total weight of the filled pack should be no more than 10 to 15 percent of the wearer39。s own body weight. Pack heaviest objects close to the body, and place little ones outside, away from the back. Putting the backpack on. Put the pack on a smooth surface, at waist height. Put on the pack, one shoulder at a time, then adjust（調(diào)整）the straps to fit fortably. Remember when lifting a backpack, or anything, to lift using the arms and legs and to bend at the knees. The right way to wear a backpack. Both shoulder straps should be used, and adjusted so that the pack fits the body, without hanging to one side. Backpacks should never be worn over just one shoulder. You should be able to move your hands between the backpack and your back. The waist strap should also be worn. Take the above advice, and you may not plain back pain, numbness or weakness in your arms and legs any more.（1）What could mainly cause some young people to suffer back pain by their teenage years? A.Too much homework.B.Poor treatment for backs.C.Improper use of backpacks.D.Unhealthy sleep position（2）Which of the following does the writer suggest?①Choose leather backpacks because it looks cool to go to school.②Pick a pack that its size is suitable for the wearer39。s body.③Make sure the backpack contains only what is needed for that day④Pack heaviest objects close to the body, and place little ones outside.⑤Put the pack on a smooth surface, above the waist height.A.①②④B.①③⑤C.②③④D.②③⑤（3）If a boy weighs 40kg, how heavy should his filled backpack be at most? A.About 4kg.B.About 6kg.C.About 10kg.D.About 15kg.（4）What is the passage mainly about? A.Some problems that teenagers face in their study at school.B.The suitable backpack material that you should choose.C.The good influence that backpacks have on your healthD.Some advice on how to carry backpacks fortably and safely.【答案】 （1）C（2）C（3）B（4）D 【解析】【分析】短文大意： 短文主要講述背包影響學生的健康，如何舒服地和安全地使用背包。 （1）細節(jié)理解題。根據(jù) More than 50 percent of young people suffer back pain by their teenage years. Research shows that this could be mainly caused （場）improper use of backpacks. 可知不正確使用背包可能誰引起背疼。故選C。 （2）細節(jié)判斷題。根據(jù) Make sure the pack fits properly and its size is suitable for the wearer39。s body. 保證背包的大小與背書包的人相符，即②；Only put in the pack what is needed for that day. 需要的時候才背書包，即 ③ ；Pack heaviest objects close to the body, and place little ones outside, away from the back. 當背重物的時候，背包需要貼近身體，背輕的東西時，可以離遠點，即 ④ ；故選C。 （3）細節(jié)理解題。根據(jù) The total weight of the filled pack should be no more than 10 to 15 percent of the wearer39。s own body weight. 這個男孩四十公斤，可知他最多背15%40kg=6kg，故選B。 （4）此題考查主旨大意。這篇短文主要對如何正確使用背包使人更舒服更安全給出的幾點建議，故選D。 【點評】此題考查閱讀理解。先閱讀短文，理解短文大意。然后進行審題，弄清題意，帶著問題閱讀短文，從短文的細節(jié)中找出細節(jié)理解問題的答案。對于主旨大意題要根據(jù)文章的中心思想確定。4．閱讀理解 As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success. Scientists have found out that the radiation（輻射） is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won39。t be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far. Space rubbish is also thought to be a great danger to spacemen. It39。s reported that there were 9,000 manmade things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion（爆炸） in space in 1999 made a cloud of 300,000 fragments, each at least 4 mm in size. A small piece of these even knocked a spaceship window and caused some damage（損壞）. Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the earth. In the near future, it may bee possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help improve the space environment.（1） shows the manmade things in space in the correct way. A.Space rubbish: 20%。 Spaceships: 0%。 Satellites: 40%B.Space rubbish: 60%。 Spaceships: 10%。 Satellites: 30%C.Space rubbish: 50%。 Spaceships: 20%。 Satellites: 30%D.Space rubbish: 45%。 Spaceships: 30%。 Satellites: 25%（2）The radiation from the sun and other stars is to sp