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

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

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问题    Most people who travel long distances complain of jetlag (飞行时差反应) . Jetlag makes business travelers less productive and more prone【C1】______making mistakes. It is actually caused by 【C2】______of your "body clock" — a small cluster of brain cells that controls the timing of biological 【C3】______. The body clock is designed for a【C4】______rhythm of daylight and darkness, so that it is thrown out of balance when it【C5】______daylight and darkness at the wrong times in a new time zone.
   The【C6】______of jetlag often persist for days【C7】______the internal body clock slowly adjusts to the new time zone. Now a new anti-jetlag system is【C8】______that is based on proven【C9】______pioneering scientific research.
   Dr. Martin Moore-Ede has【C10】______a practical strategy to adjust the body clock much sooner to the new time zone【C11】______controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates【C12】______of the discomfort of jetlag. A successful time zone shift depends on knowing the exact time to either【C13】______or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule【C14】______light exposure depends a great deal on【C15】______travel plans. Data on a specific flight itinerary (旅行路线) and the individual’s sleep【C16】______are used to produce a Trip Guide with【C17】______on exactly when to be exposed to bright light. When the Trip Guide calls【C18】______bright light, you should spend time outdoors if possible. If it is dark outside, or the weather is bad, 【C19】______you are on an aeroplane, you can use a special light device to provide the necessary light【C20】______ for a range of activities such as reading, watching TV or working.
【C3】
选项 A、actions
B、functions
C、reflection
D、behavior
答案B
解析 空格处所在句的意思是：控制身体机能(functions)节奏的一簇脑细胞。这是形容词与名词之间的偏正搭配：身体、生理的“功能、机能”。生理活动(actions)、生理反应(reflection)不同于身体机能，而我们不说生理行为(behavior)。
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