16．A new study says one part of the human brain may become smaller as the result of a condition known as jet lag．Jet lag results from flying long distances in an airplane．Jet lag interferes with a person's normal times for sleeping and waking．People with jet lag may feel extremely tired for several days．They also may have problems thinking clearly and remembering．
Kwangwook Cho is a researcher at the University of Bristol in Britain．He reported the findings of his jet lag study in the publication Nature Neuroscience．
The study involved twenty young women who worked for international airlines．The women had served passengers on airplanes for five years．These flight attendants flew across many countries and at least seven time zones．In the study，the flight attendants had different amounts of time to recover from jet lag．Half the women spent five days or fewer in their home areas between long flights．The other half spent more than fourteen days in their home areas．
Mister Cho took some fluid from the women's mouths to measure levels of a hormone that increases during stress．He tested them to see if they could remember where black spots appeared on a computer screen．And he took pictures of their brains using magnetic resonance imaging．This is a way to measure the size of the brain's temporal lobes（顳葉）．
It was found that the women who had less time between flights had smaller right temporal lobes．This area of the brain deals with recognizing and remembering what is seen．The same group performed worse and had slower reaction times on the visual memory test．And their saliva samples showed higher levels of stress hormones．
Mister Cho says he believes the brain needs at least ten days to recover after a long trip．He says airline workers told him their ability to remember got worse after working on planes for about four years．Other studies have shown that increased feelings of stress can cause a loss of cells in the part of the brain that controls memory．
Scientists say more tests are needed to study the effects of jet lag on the brain．They want to find out if too much jet lag could permanently affect memory．
72．According to the text，jet lagD．
A．can cause difficulties in speaking
B．can make people feel tired for a few weeks
C．is the illness only found in people who work on the airplanes
D．can be caused by flying over several time zones in an airplane
73．It is inferred that more tests need to be done becauseC．
A．the conclusion was questioned by many scientists
B．scientists fear that his research is not done properly
C．every scientific conclusion needs the support from many tests
D．the woman who were studied in the research were not healthy
74．Which of the following statements is TRUE about the research results？A
A．Women who have a longer rest at home show better memory．
B．Women who fly in short time had smaller right temporal lobes．
C．Women who have longer flights failed the memory test．
D．Women who rest more than 14 days produced less hormones．
75．What is the subject discussed in the test？C
A．The cause of jet lag．
B．A story of a group of flight attendance．
C．A research about the effects of jet lag on the brain．
D．The importance of having enough rest after long flights．

分析 這是一篇科普文章，是科學(xué)家對于飛行時(shí)差反應(yīng)對人腦的影響所做的實(shí)驗(yàn)．

解答 72-75．DCAC
73題答案：D考查細(xì)節(jié)推理，根據(jù)文章第一段Jet lag results from flying long distances in an airplane．People with jet lag may feel extremely tired for several days．"飛行時(shí)差是源于長距離的飛行，有飛行時(shí)差的人一連幾天會(huì)感到極其疲憊"，可知本題答案為D．
74題答案：C考查細(xì)節(jié)推理，根據(jù)最后一段Scientists say more tests are needed to study the effects of jet lag on the brain．科學(xué)家說需要更多的測試來研究飛行時(shí)差對大腦的影響，故答案應(yīng)為C選項(xiàng)．
74題答案：A根據(jù)文章倒數(shù)第二段He says airline workers told him their ability to remember got worse after working on planes for about four years．他說航空工作人員告訴他他們的記憶能力在飛機(jī)上工作大約四年后會(huì)變差，可知A符合題意．
75題答案：C考查細(xì)節(jié)推理，根據(jù)Scientists say more tests are needed to study the effects of jet lag on the brain．可知本題答案為C選項(xiàng)．

點(diǎn)評 一般情況下科普類文章是閱讀理解題的難點(diǎn)，它們生詞多、專業(yè)術(shù)語多，理解難度比較大．對于這類文章我們要靜下心來，先略讀，通讀全文，對文章大意有個(gè)模糊理解，然后看題目，再帶著題目細(xì)讀文章，找到答題依據(jù)，得出正確答案．

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I started the engine and thumped slowly along until I came to the dirt road，where I turned in and where I found lighted windows welcomed me to a house and pulled into the driveway and honked the horn．
The door opened and a little girl stood there．When she knew what happened to me，she went into the house and a moment later came out，followed by a man who called a cheerful greeting．I sat there comfortable and dry，and felt a bit sorry for the man and the little girl working so hard in the storm．
About an hour later，the man's voice was heard，"This is a bad night for car trouble，but you're all set now．"Thanks．"I said，"How much do I owe you？"He shook his head，"Nothing．Cynthia told me you were a cripple．Glad to be of help．I know you'd do the same for me．There's no charge，friend．"I held out a fivedollar bill，"No!I like to pay my way．"He made no effort to take it and the little girl stepped closer to the window and said quietly，"Grandpa can't see it．"

59．"A cat has nine lives"here meansC．
A．a(chǎn) cat can live nine times longer than any other animal
B．a(chǎn) cat can die ninth
C．a(chǎn) lucky man can not die easily
D．the writer will live nine times
60．What do you think of the man who helped change the tire？B
A．Old，warmhearted but pitiable．
B．Blind，but warmhearted and happy．
C．A blind old man that has nothing to do every day．
D．A poor old man that is always ready to help others．
61．How do you understand the underlined sentence"I followed her example within the  year"？C
A．He listened to his sister carefully．
B．Mother told him that he must get the agreement from his sister for whatever he would do．
C．His sister got married．He，too．
D．His sister was a great woman．He must learn from her．

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科目：高中英語 來源： 題型：閱讀理解

6．The following safety risks may result in serious injury or death to the user of the MINI Cooper S：
l This product contains small parts that are for adult assembly （組裝） only．Keep small children away when assembling．Remove all protective materials before assembly．Be sure to remove all packaging materials and parts from underneath the car body．
l Battery posts contain lead known to the state of California to cause cancer and reproductive harm．Never open the battery．
l Body parts such as hands，legs，hair and clothing can get caught in moving parts．Never place a body part near a moving part or wear loose clothing while using the vehicle．Always wear shoes when using the vehicle．
l Using the vehicle near streets，motor vehicles，drop-offs such as steps，water （swimming pools） or other bodies of water，hills，wet areas，in alleys，at night or in the dark could result in an unexpected accident．Instead，use the vehicle on the highway．Always use the vehicle in a safe，secure environment．
l Using the vehicle in unsafe conditions such as snow，rain，loose dirt，mud，or sand may result in unexpected action，for example tip over．
l Using the vehicle in an unsafe manner may result in unexpected outcome．Examples include but are not limited to：
? Pulling the vehicle with another vehicle or similar device
? Allowing more than two riders
? Pushing the user from the back
? Traveling at an unsafe speed
l Always use common sense and safe practices when using the vehicle．
l Store the vehicle indoors or cover it to protect it from weather．Water will damage the motor，electric system，and battery．
21．When assembling，you shouldC．
A．open the battery on the spot
B．ignore the packaging materials
C．keep small children off the spot
D．take away all protective materials
22．According to the text，it is safer toA．
A．drive on the highway instead of on hills
B．push the user from behind at the start
C．have at least four passengers
D．wear loose clothes while using the vehicle
23．Where can we probably find the text？D
A．An official report．
B．A popular magazine．
C．A physics textbook．
D．A product handbook．

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