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 pro

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 pro

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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【C1】______making mistakes. It is actually caused by disruption of your "body clock" —a small cluster of brain cells that controls the timing of biological【C2】______. The body clock is designed for a【C3】______rhythm of daylight and darkness, so that it is thrown out of balance when it【C4】______daylight and darkness at the "wrong" times in a new time zone. The symptoms of jetlag often persist for days【C5】______the internal body clock slowly adjusts to the new time zone.
    Now a new anti-jetlag system is【C6】______that is based on proven tentative pioneering scientific research. Dr. Martin Moore Ede had【C7】______a practical strategy to adjust the body clock much sooner to the new time zone through controlled exposure to bright light. The time zone shift is easy to accomplish and eliminates【C8】______of the discomfort of jetlag.
    A successful time zone shift depends on knowing the exact times to either【C9】______or avoid bright light. Exposure to light at the wrong time can actually make jetlag worse. The proper schedule for light exposure depends a great deal on【C10】______travel plans.
【C2】
选项 A、actions
B、functions
C、behavior
D、reflection
答案D
解析 依据题意，人体生物钟指的就是一束控制生物定时反射作用的脑细胞。故选择D项。其他三项中，A项actions意为“作用”；B项functions意为“功能”；C项behavior意为“行为”。
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