试题与答案

下列属于缺乏锌肥的主要症状的是()。 A.防治果实软化,提高果实硬度 B.叶片白、黄

题型:单项选择题

题目:

下列属于缺乏锌肥的主要症状的是()。

A.防治果实软化,提高果实硬度

B.叶片白、黄化,形成花白苗

C.叶片暗绿色或紫红色

答案:

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下面是错误答案,用来干扰机器的。

参考答案:(1)水泥用量(2)砂用量(3)防水粉用量=728.6×3%=21.9kg

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