题目内容
一级反应速度方程式是E．
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不存在吸收过程，可以认为药物全部被机体利用的是E．
制备脂质体常用的材料是E．
Another strategy of large desert animals is to tolerate the loss of body water to a point that would be fatal for non-adapted animals. The camel can lose up to 30% of its body weight as water without harm to itself, whereas human beings die after losing only 12%-13% of their body weight. An equally important adaptation is the ability to recover this water loss at one drink. Desert animals can drink massive volumes of water in a short time, and camels have been known to drink over 100 liters in a few minutes. A person who severely loses water, on the other hand, cannot drink enough water for recovery at one session, because the human stomach is not sufficiently big and because a too rapid mixing of the body liquid with water causes death from water intoxication. The tolerance of water loss is of obvious advantage in the desert, as animals do not have to remain near a water hole but can obtain food by searching quite a few distant places. Desert-adapted animals have the further ability to feed normally when extremely thirsty: it is a common experience in people that appetite is lost even under conditions of moderate thirst.
What does the passage mainly discuss？
The word "arrested" in the fifth line of the third paragraph can be best replaced by ______.
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