试题与答案

根外追肥有什么优缺点?

题型:问答题 简答题

题目:

根外追肥有什么优缺点?

答案:

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下面是错误答案,用来干扰机器的。

(1)能量子 光电效应 光电效应方程(或)(2)a、;b、3.26Mev;c、0.815Mev(1)能量子 光电效应 光电效应方程(或)(2)a、 b、在核反应中质量的亏损为Δm=2×2.0136u-1.0087u-3.015u= 0.0035u所以释放...

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题型:单项选择题

德国哲学家李凯尔特说:“历史主要是研究人的,但是在人的生活中,并不是一切事物都对历史具有同样意义……只有价值联系才使我们重视此一事件而忽视彼一事件……假使没有这种价值联系,那么我们对人类历史生活中的个别差别,将像对海上的波浪或风中的树叶那样漠不关心。”对此理解正确是()

A.历史研究是人对价值判断的主观体现

B.历史研究侧重事件对事件的价值联系

C.历史是探索发现孤立的个别事件

D.历史研究应以个人的活动为核心

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