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【判断题】
如果函数 在点 处间断,则 一定不存在。 ____A.
正确
B.
错误
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【简答题】金融期货主要包括（ ）。
【单选题】By 'the pendulum is swinging too far', Ian Perry probably means
A.
the number of houses sold by each agent is the lowest in history.
B.
the house market is bound to suffer because of the high interest rates.
C.
both Mr. King and the media worried too much over the price falls.
D.
the Bank and the media are helping push the house prices further down.
【单选题】__________________________________ Before pendulum clocks were invented, Peter Henlein of Germany invented a spring-powered clock around 1510. It was not very precise. The first clock with a minute ha...
A.
Dividing the day into hours, minutes,and seconds
B.
Using the sun
C.
Dividing the year into months and days
D.
Sundial clocks
E.
Water clocks
F.
Pendulum clocks
【单选题】It is implied by 'The pendulum swung far right during the 1990's...'that______.
A.
it was no easy task to change what Americans thought about divorce in the 1990's
B.
parents in the 1990's would think twice before they got divorced
C.
people were discouraged to get divorced by the 1990's law
D.
people could resort to law to regulate family relations
【简答题】在培育转基因植物的研究中，卡那霉素抗性基因（kan）常作为标记基因，只有含卡那霉素抗性基因的细胞才能在卡那霉素培养基上生长。下图为获得抗虫棉的技术流程。请据图回答： 抗虫基因在基因工程中称为（）。该基因能否在真核生物中稳定遗传的关键是检测（）。
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