发布时间:2025-01-31 23:31:55
在脊髓中央,围绕中央管的是灰质,中央管纵贯脊髓,内含脑脊液,上通第4脑室,下扩大为终室。40岁以上的人常闭塞。
我房间外有个lcd tv 的铁箱子 距离很近 一墙之隔 请问专家个东西运转时有无辐射 对人有没有影响 谢谢
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