问题
单项选择题
属于动物专用的氟喹诺酮类药物是（）
A.环丙沙星
B.沙拉沙星
C.诺氟沙星
D.氧氟沙星
E.洛美沙星
答案
参考答案：B
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属于动物专用的氟喹诺酮类药物是（）
A.环丙沙星
B.沙拉沙星
C.诺氟沙星
D.氧氟沙星
E.洛美沙星
参考答案：B
Do you find getting up in the morning so difficult that it’s painful? This might be called laziness, but Dr. Kleitman has a new ___36____. He has proved that everyone has a daily energy cycle. During the hours when you labour through your work, you __37___ say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is ___38____. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered __39___ this is so , but it leads to such familiar monologues （自言自语）__40___ “Get up , John ! You’ll be late for work again!” The ___41___ explanation to the trouble is that John is at his temperature—and —energy peak in the evening. Much family quarrelling ___42___ when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has. You can’t change your ___43___, but you can make your life ___44___ it better. Habit can help. Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late ___45___. Counteract （打乱）your cycle to some extent by ___46___ staying up later than you want to . If your energy is ___47___ in the morning but you have an important job to do early in the day, ___48___ before your usual hour. This won’t change your cycle, but you’ll get up steam(打起精神) and work better ___49___. Get off to a slow start ___50___ saves your energy. Get up with a yawn （呵欠）and ___51___ . Sit on the edge of the bed a minute before ___52____ on the floor. Avoid the ___53___ search for clean clothes by laying them out ___54___. Whenever possible , do routine （常规的）work in the afternoon and save tasks ___55____ more energy for your sharper hours .
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