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10楼#
发布于：2013-08-06 08:54
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![勇不止步[春]](https://bbs.jd100.com/attachment/medal/f783eb36b20a4e2.jpg "勇不止步[春]"){kind=small}
![20天大作战[2015]](https://bbs.jd100.com/attachment/medal/cec543c13f7ea1b.jpg "20天大作战[2015]"){kind=small}
![20天大作战[2014]](https://bbs.jd100.com/attachment/medal/465e7ccd53045d5.png "20天大作战[2014]"){kind=small}
![7天勇士[寒]](https://bbs.jd100.com/attachment/medal/3ae915c994fd934.jpg "7天勇士[寒]"){kind=small}
![28天勇士[暑]](https://bbs.jd100.com/attachment/medal/e87f38d2f0151f0.jpg "28天勇士[暑]"){kind=small}
![21天勇士[暑]](https://bbs.jd100.com/attachment/medal/63814ff34bb2a24.jpg "21天勇士[暑]"){kind=small}
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11楼#
发布于：2014-02-11 20:08
不会
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12楼#
发布于：2014-02-18 21:02
瓶内大气压低于外界大气压 所以试管内部液体不会流出 这个实验所用的试管倒置之后上部会有一段空气柱
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13楼#
发布于：2014-03-14 22:48
不是按住试管口了吗?
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14楼#
发布于：2014-08-07 10:13
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