2. 考研
  3. Most people who travel long distance complain of jetlag. Jetlag makes business travelers less productive and more prone 【C1】____

Most people who travel long distance complain of jetlag. Jetlag makes business travelers less productive and more prone 【C1】____

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问题         Most people who travel long distance complain of jetlag. 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 regular rhythm of daylight and darkness, so that it is thrown out of balance when it【C3】__________daylight and darkness at the "wrong" times in a new time zone. The【C4】__________of jetlag of ten persist for days while the internal body clock slowly adjusts to the new time zone.
        Now a new anti-jetlag system is【C5】__________that is based on proven【C6】__________pioneering scientific research. Dr. Martin Mooreede had devised a practical strategy to adjust the body clock much sooner to the new time zone【C7】__________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【C10】__________specific travel plans.
【C7】
选项 A、in
B、as
C、at
D、through
答案D
解析 通过原文可知，此处需填入表示“通过”“凭借”的介词，故选D。
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