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叶暗绿色,生长延缓,下部叶的叶脉间黄化,表明缺()的表现。
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叶暗绿色,生长延缓,下部叶的叶脉间黄化,表明缺()的表现。
A、N
B、P
C、Na
D、Fe
时间：2021-09-02 13:16
关键词：
青书学堂
延安大学
花卉学(专升本)
答案解析
B
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关于生长叶的说法正确的是
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叶暗绿色,生长延缓,下部叶的叶脉间黄化,表明缺()的表现。
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缺（）往往引起黄瓜先从下部老叶开始黄化，逐渐向幼叶扩展，植株矮小，瘦弱，早衰，产量低，产品品质差。
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