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Camels,on the other hand,rely more on simple endurance.They cannot store water, and their reliance on an entirely unexceptional kidney results in a rate of water loss through renal function significantly higher than that of desert rats.As a result,camels must tolerate losses In Body water of up to thirty percent of their body weight.Nevertheless,camels do rely on a special mechanism to keep water loss within a tolerable range:by sweating and panting only when their body temperature exceeds that which would kill a human,they conserve internal water.
13. According to the passage,the camel maintains internal fluid balance in which of the following ways? I. By behavioral avoidance of exposure to conditions that lead to fluid loss II. By an ability to tolerate high body temperatures III. By reliance on stored internal fluid supplies (A) I only (B) II only (C) I and II only (D) II and III only (E) I,II , and Ill 请问大家这道题目为什么选B啊?我看不懂后面的解释。谢谢! |