搜索 - 科创

%7B%22c%22%3A%22%E5%BC%BA%E5%BA%A6%22%2C%22t%22%3A%22%22%2C%22d%22%3A%22%22%2C%22selectedForums%22%3A%5B%5D%2C%22excludedForums%22%3A%5B%5D%2C%22threadCategories%22%3A%5B%7B%22_id%22%3A21%2C%22name%22%3A%22%E5%8C%85%E5%90%AB%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD%E4%BA%A7%E7%89%A9%22%2C%22nodeName%22%3A%22%E4%B8%8D%E5%8C%85%E5%90%ABAI%E5%86%85%E5%AE%B9%22%2C%22nodes%22%3A%5B%7B%22_id%22%3A22%2C%22name%22%3A%22%E5%8C%85%E5%90%ABAI%E7%94%9F%E6%88%90%E7%9A%84%E9%87%8E%E7%94%9F%E5%86%85%E5%AE%B9%22%7D%2C%7B%22_id%22%3A24%2C%22name%22%3A%22%E4%BD%9C%E8%80%85%E5%AF%B9AI%E7%94%9F%E6%88%90%E5%86%85%E5%AE%B9%E8%B4%9F%E8%B4%A3%22%7D%2C%7B%22_id%22%3A23%2C%22name%22%3A%22%E4%BD%9C%E8%80%85%E8%B4%9F%E8%B4%A3%E3%80%81AI%E5%8D%8F%E5%8A%A9%22%7D%5D%7D%2C%7B%22_id%22%3A1%2C%22name%22%3A%22%E7%89%B9%E6%AE%8A%E8%AF%9D%E9%A2%98%22%2C%22nodeName%22%3A%22%E4%BB%A5%E4%B8%8A%E9%83%BD%E4%B8%8D%E6%98%AF%22%2C%22nodes%22%3A%5B%7B%22_id%22%3A2%2C%22name%22%3A%22%E6%8F%90%E9%97%AE%2F%E6%B1%82%E5%8A%A9%22%7D%2C%7B%22_id%22%3A13%2C%22name%22%3A%22%E6%97%B6%E4%BA%8B%E6%97%B6%E6%94%BF%22%7D%2C%7B%22_id%22%3A8%2C%22name%22%3A%22%E4%BA%8B%E6%95%85%E6%8A%A5%E5%91%8A%22%7D%5D%7D%2C%7B%22_id%22%3A5%2C%22name%22%3A%22%E5%8A%A8%E6%89%8B%E5%AE%9E%E8%B7%B5%22%2C%22nodeName%22%3A%22%E4%BB%A5%E4%B8%8A%E9%83%BD%E4%B8%8D%E6%98%AF%22%2C%22nodes%22%3A%5B%7B%22_id%22%3A6%2C%22name%22%3A%22%E5%AE%9E%E9%AA%8C%E6%8A%A5%E5%AF%BC%22%7D%2C%7B%22_id%22%3A7%2C%22name%22%3A%22%E7%A4%BE%E4%BC%9A%E5%AE%9E%E8%B7%B5%22%7D%5D%7D%2C%7B%22_id%22%3A9%2C%22name%22%3A%22%E4%B8%A5%E8%82%83%E5%86%85%E5%AE%B9%22%2C%22nodeName%22%3A%22%E4%BB%A5%E4%B8%8A%E9%83%BD%E4%B8%8D%E6%98%AF%22%2C%22nodes%22%3A%5B%7B%22_id%22%3A10%2C%22name%22%3A%22%E9%A2%84%E5%8D%B0%E6%9C%AC%22%7D%2C%7B%22_id%22%3A14%2C%22name%22%3A%22%E4%B8%93%E8%91%97%2F%E8%AE%BA%E8%BF%B0%22%7D%2C%7B%22_id%22%3A12%2C%22name%22%3A%22%E6%95%99%E7%A8%8B%2F%E8%AF%BE%E7%A8%8B%22%7D%2C%7B%22_id%22%3A11%2C%22name%22%3A%22%E4%B8%93%E4%B8%9A%E7%A7%91%E6%99%AE%22%7D%2C%7B%22_id%22%3A15%2C%22name%22%3A%22%E6%A0%87%E5%87%86%2F%E8%A7%84%E8%8C%83%22%7D%5D%7D%5D%2C%22form%22%3A%22%22%7D

钾-40应该算是日常生活中最常见的放射性核素了，所有天然含钾物都含有钾-40（最典型的就是香蕉了，吃一根普通大小的香蕉，从摄入到6倍生物半衰期，人总共会受到约0.1uSv的辐射），同时钾-40也是极少...

鉴于论坛内某人做的试验，本人不是很服，于是我做了如下试验先说明试验用品1、自制真空室一个。压力为0.08MPa2、真空活塞一个，提供拉力，以排除人为因素的影响。3、弹簧秤一把。鉴于上次的弹簧秤在测试发...

文件下载

加载中...

你在 {{ downloadTime }} 下载过当前文件。

文件名称：{{ resource.defaultFile.name }}

下载次数：{{ resource.hits }}

上传用户：{{ uploader.username }}

所需积分：{{ costScores }}，{{ holdScores }}下载当前附件免费{{ description }}

下载地址：{{ l.name }}

积分不足，去充值

文件已丢失

当前账号的附件下载数量限制如下：

时段	个数
{{f.startingTime}}点 - {{f.endTime}}点	{{f.fileCount}}

约找到 3419 条结果，耗时 0.155 秒

当前账号的附件下载数量限制如下：