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第223章 抗拒无效(2 / 2)

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安小药:“既然是氢的同位素,它们与氧结合,都能形成水,水是可以被蒸发进入大气层的。”

吕小花点点头。

安小药继续道:“水中本身就含有氘和氚,但是含量很少,其中氚的含量微乎其微,它是水中天然放射性的来源。”

“这本身是很正常的现象,但是核污水中含有的氚排放到大海,会导致大海中氚含量增高,从而进入水循环,待浓度达到一定程度后,水的放射性的危害就慢慢体现出来了。”

吕小花问:“具体有什么危害呢?”

安小药:“氚进入人体后,轻度会导致人疲乏无力、嗜睡、食欲减退。”

“这个好,可以减肥!”柳小草兴奋道。

安小药看了她一眼,又道:“重度的,就会导致一些慢性放射病,还会致癌。”

柳小草撇下嘴:“那就不好了。”

夏小安叹了口气:“关键还是个浓度的问题。”

“对。”

安小药看着她们说:“而且,核污水中含量最高的放射性元素,就是氚。”

接下来又给她们讲了沉积的放射性元素对环境的影响。

大家听完后,都保持了沉默。

这时候,何小光醒了。

他趴在地上愣了会儿,才从地上爬起来,拍拍身上的尘土,看了看周围环境。

看到女生们聚在一起集体沉默,他一脸疑惑地走了过去。

安小药第一个看到他,大声问:“老师,你怎么醒了?”

何小光也很奇怪,问:“你们怎么在这里?”

大家给他说了事情的来龙去脉,故意隐去了安小药背他背不动,把他摔倒在地的那一段。

何小光听后,自言自语:“这个地方真是奇怪。”

安小药看着他,问:“老师,您都做了什么题,这么入迷?”

听到做题,何小光又来了精神:“我做了语文,数学,英语,物理……”

安小药有点不耐烦,又问:“那您怎么醒了?不继续做题?”

何小光叹了口气,说:“做到后面,全是化学题,我都做睡着了,然后就出来了。”

原来如此,女生们恍然大悟。

化学老师对化学如数家珍,让他一直做化学题,就跟小学生做五以内的加减法似的,毫无挑战性。

不过,自己做着无聊,把题分享给同学们,那就不无聊了。

何小光看着她们,说:“正好,我这有道题,给你们练一下。”

“现在?在这里?”田小磨有点抗拒。

何小光没有注意到田小磨满脸写着抗拒,自顾自地出题。

一定条件下,物质的量均为0.3mol的X(g)和Y(g),在体积固定的密闭容器中发生反应:X(g)+3Y(g)?2Z(g)

ΔH\u003d-a kJ·mol?1

下列说法正确的是:

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