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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 it 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 anti-jetlag system is (28) that is based on proven (29) pioneering scientific re- search. Dr. Martin Moore-Ere 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 bright light. 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 (旅行路线) 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 aero plane, 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. 28().
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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 it 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 anti-jetlag system is (28) that is based on proven (29) pioneering scientific re- search. Dr. Martin Moore-Ere 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 bright light. 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 (旅行路线) 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 aero plane, 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. 23().
At the beginning of the century, medical scientists made a surprising discovery: that we are (1) not just of flesh and blood but also of time. They were able to (2) that we all have an internal "body clock" which (3) the rise and fall of our body energies, making us different from one day to the (5) . These forces became known as biorhythms: they create the (5) in our everyday life.The (6) of an internal "body clock" should not be too surprising, (7) the lives of most living things are dominated by the 24-hour night-and-day cycle. The most obvious (8) of this cycle is the (9) we feel tired and fall asleep at night and become awake and (10) during the day. (11) the 24-hour rhythm is interrupted, most people experience unpleasant side effects.(12) , international aeroplane travelers often experience "jet lag" when traveling across time (13) . People who are not used to (14) work can find that lack of sleep affects their work performance.(15) the daily rhythm of sleeping and waking, we also have other rhythms which (16) .longer than one day and which influence wide areas of our lives. Most of us would agree that we feel good on (17) days and net so good on others. Sometimes we are (18) fingers and thumbs but on other days we have excellent coordination. There are times when we appear to be accident-prone, or when our temper seems to be on a short fuse. Isn’t it also strange (19) ideas seem to flow on some days but at other times are (20) nonexistent Musicians, painters and writers often talk about "dry spells". Read the following text. Choose the best word(s) for each numbered blank and mark A,B,C or D on ANSWER SHEET Ⅰ.13（）
当交换机到根网桥的间接链路出现失效故障时（如图，链路L1失效），STP协议会将交换机C的阻塞端口的工作状态转换为转发状态，为了省去端口状态转换等待时间，让端口直接由侦听和学习状态转换为转发状态，需配置交换机STP的可选功能是（）
At the beginning of the century, medical scientists made a surprising discovery: that we are (1) not just of flesh and blood but also of time. They were able to (2) that we all have an internal "body clock" which (3) the rise and fall of our body energies, making us different from one day to the (5) . These forces became known as biorhythms: they create the (5) in our everyday life.The (6) of an internal "body clock" should not be too surprising, (7) the lives of most living things are dominated by the 24-hour night-and-day cycle. The most obvious (8) of this cycle is the (9) we feel tired and fall asleep at night and become awake and (10) during the day. (11) the 24-hour rhythm is interrupted, most people experience unpleasant side effects.(12) , international aeroplane travelers often experience "jet lag" when traveling across time (13) . People who are not used to (14) work can find that lack of sleep affects their work performance.(15) the daily rhythm of sleeping and waking, we also have other rhythms which (16) .longer than one day and which influence wide areas of our lives. Most of us would agree that we feel good on (17) days and net so good on others. Sometimes we are (18) fingers and thumbs but on other days we have excellent coordination. There are times when we appear to be accident-prone, or when our temper seems to be on a short fuse. Isn’t it also strange (19) ideas seem to flow on some days but at other times are (20) nonexistent Musicians, painters and writers often talk about "dry spells". Read the following text. Choose the best word(s) for each numbered blank and mark A,B,C or D on ANSWER SHEET Ⅰ.5（）
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