发布时间:2025-01-24 17:51:28
三个月。砍下来的香椿树放在水里浸泡三个月,再捞起来晾干,那样打出来的家具不裂纹。香椿木又名红椿木或香椿芽树,有中国桃花心木之称。
下面是用1500的比例尺画出的平面图请计算出它的实际面积要过程六年级的急急急
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