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Reading Classics 写作要点： 1．阅读名著能给人以享受。 2．阅读名著对语言的学习很有帮助。 3．阅读名著可以提高人自身的修养。
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【单选题】This week marks the 10th anniversary of the Alar apple scare, in which many American consumers were driven into a panic following the release of a report by an environmental organization claiming that...
A.
scientists warned that apples were dangerous
B.
many school children became iii after eating apples
C.
it was reported that apples were harmful to health
D.
apples were discovered to have too much pesticide
【单选题】Which apple began the wisdom of human beings? ( )
A.
The apple of Adam and Eve
B.
The apple of Newton
C.
The apple Steve Jobs
【单选题】用水平力 把物体压在竖直墙壁上静止不动,设物体受墙的压力为 ,摩擦力为 ,则当水平力 增大时,下列说法中正确的是:
A.
增大, 增大
B.
增大, 不变
C.
增大, 减小
D.
条件不足,不能确定
【单选题】判断一整流二极管好坏时,红表笔接其管壳,黑表笔接中心引线,测得的电阻值约为9Ω左右;对换表笔测得电阻为∞。请判断该二极管是否损坏;该二极管是正极管还是负极管?( )
A.
是，正极管
B.
否，正极管
C.
是，负极管
D.
否，负极管
【单选题】判断一整流二极管好坏时,红表笔接其管壳,黑表笔接中心引线,测得的电阻值约为9Ω左右;对换表笔测得电阻为∞。请判断该二极管是否损坏;该二极管是正极管还是负极管?
A.
是，正极管
B.
否，正极管
C.
是，负极管
D.
否，负极管
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