A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock______(51)plants when to form. flowers and when the flowers should open. It tells insects when to______(52)the protective cocoon(防护卵袋)and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal______(53)the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the______(54)of hours of daylight. In the short______(55)of winter, its fur becomes white. The fur becomes gray brown in______(56)in the longer hours of daylight in summer.
Inner signals control other______(57)clocks. German scientists found that some kind of internal clock seems' to order birds to begin their long migration ______(58)twice each year. Birds______(59)from flying become restless when it is time for the trip,______(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which______(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain______(62)to control the timing of some of our actions. These______(63)tell a person when to wake, when to______(64)and when to seek food. Scientists say there probably are other biological clock Cells that ______(65)other body activities.
A.says
B.asks
C.tells
D.talks
第3题
A.劳力过度
B.房劳过度
C.劳神过度
D.劳心过度
E.安逸过度
第4题
A.脾阴不足
B.胃阴不足
C.胃燥津亏
D.胃热炽盛
E.肝胃不和
第5题
A.肝火上炎
B.肝阳上亢
C.热极生风
D.肝阳化风
E.肝气郁结
第6题
A.哮证缓解期,肺虚
B.哮证缓解期,脾虚
C.哮证缓解期,肾虚
D.虚喘,肺虚
E.虚喘,肾虚
第8题
A、.热扰心神
B、.痰火扰心
C、.风痰阻络
D、.心气不足
E、.心阴大伤
第9题
A.栀子、黄柏
B.青蒿、黄芩
C.大黄、黄柏
D.栀子、大黄
E.青蒿、大黄
第10题
A.益气通便
B.温阳通便
C.养血润燥
D.润肠通便
E.健脾温中
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