2. 外语
  3. Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more pr

Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more pr

admin2010-06-30  32
问题    Most people who travel long distances complain of jetlag (喷气飞行时差反应). Jetlag makes business travelers less productive and more prone  【21】______  making mistakes. It is actually caused by  【22】______  of your “body clock” a small cluster of brain cells that controls the timing of biological  【23】______  The body clock is designed for a  【24】______  rhythm of daylight and darkness, so that is thrown out of balance when it  【25】______  daylight and darkness at the “wrong times in a new time zone. The  【26】______  of jetlag often persist for days  【27】______  the internal body clock slowly adjusts to the new time zone. Now a new antijetlag system is  【28】______  that is based on proven  【29】______  pioneering scientific research. Dr. martin Moore-Ede has  【30】______  a practical strategy to adjust the body clock much sooner to the new time zone  【31】______  controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates  【32】______  of the discomfort of jetlag.
   A successful time zone shift depends on knowing the exact times to either  【33】______  or avoid brightlight. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule  【34】______  light exposure depends a great deal on  【35】______  travel plans.
   Data on a specific flight itinerary(施行路线) and the individual’s sleep  【36】______  are used to produce a Trip Guide with  【37】______  on exactly when to be exposed to bright light.
   When the Trip Guide calls  【38】______  bright light you should spend time outdoors if possible. If it is dark outside, or the weather is bad,  【39】______  you are on an aeroplane, you can use a special light device to provide the necessary light  【40】______  for a range of activities such as reading, watching TV or working.
【27】
选项 A、while
B、whereas
C、if
D、although
答案A
解析 本题要求考生根据句内关系选择连接词。空格所在的句子是个主从复合句，意思是：“——体内的时钟慢慢地适应新时区——，时差反应的症状常常持续好几天。”显然，空格中应填放一个表示时间的连接词，即：“正在……的时候”。在4个选择项中，只有while(正当……时)是时间连接词，因此A是答案。B项whereas(而，却，反之)是表示转折的连接词，连接两个意思相反的部分，本句前后意思并不相反，B不可能是答案。if(结果)是表示条件的连接词，但是本句前后并不存在条件关系，选项C．也不是答案。还有11%的考生误选了D项alt
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