发布时间:2025-02-02 22:06:03
春季芽萌动前进行。橡树在一年生苗高达40-60厘米时,可进行移植,移植时间在秋季落叶后至春季芽萌动前进行。移植时注意根系的保护,尽量多带侧根。
用一个开关同时控制两个电灯应怎样连接电路先连实物图后画电路图如图所示
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