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当前学科：桑园工考试
题目：
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种好桑树，提高桑树成活率，首先要平整土地，全面深耕，在此基础上掌握以下环节（）
A . A．施足基肥
B . B．选择良种壮苗
C . C．深耕浅栽
D . D．剪除苗梢
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