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【简答题】
(无穷大量与无穷小量的关系)若函数 是 时的无穷大量,则 = 。
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举一反三
【单选题】It is simple enough to say that since books have classes -- fiction, biography, poetry -- we should separate them and take from each what it is right and what should give us. Yet few people ask from b...
A.
we are eager to know the result of the book
B.
we have formed some ideas beforehand
C.
we have some prejudice against the author
D.
we are doubtful about the facts to be shown
【单选题】关于链反应的特点,以下说法错误的是
A.
链反应一般都有自由基或自由原子参加
B.
反应开始时的反应速率都很大
C.
链的引发需要活化能
D.
直链反应的特点是反应平稳，不容易发生爆炸
【简答题】His life story is recounted (复述) in two fascinating volumes of his ______. (biography)
【简答题】The biography what Einstein ’ s life was like as a child. (glimpse)
【单选题】In his biography, the old scientist is described as a very ______ truth seeker.
A.
infectious
B.
prosperous
C.
industrious
D.
generous
【单选题】关于链反应的特点, 以下说法错误的是
A.
链反应的几率因子都远大于 1
B.
链反应开始时的速率都很大
C.
很多链反应对痕迹量物质敏感
D.
链反应一般都有自由基或自由原子参加
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