题目内容
12．How can a creature weighing over 5tons and normally taking 150kilograms food and 120liters of water per day survive in a desert environment？In the southwest African country of Namibia，and the Sahara lands of Mali further north，the desert elephant does just that
Although not regarded as a separate species from the African elephant，the desert cousin differs in many ways．Their bodies are smaller，to absorb less heat，and their feet are larger for easier walking across sandy surfaces．They are taller to reach higher branches．They have shorter tusks，and most importantly，longer trunks to dig for water in riverbeds
Desert elephants can travel over 70kilometers in search for feeding grounds and water holes，and have a larger group of families．They drink only 3-4days，and can store water in a"bag"at the back of their throat，which is only used when badly needed．Dersert elephants are careful feeders------they seldom root up trees and break fewer branches，and thus maintain what little food sources are available．Young elephants may even eat the dung（粪便）of the female leader of a group when facing food shortage．
During drought they are unlikely to give birth to their young but with good rains the birthrate will increase greatly．Desert elephants have sand baths，sometimes adding their own urine （尿） to make them muddy!
As we continue to overheat our weak planet，it can only be hoped that other animal species will adapt（调整．适应） as extraordinarily well to change as the desert elephant．
73．Desert elephants are called careful feeders because theyA
A．rarely ruin trees
B．drink only every 3-4days
C．serach for food in large group
D．protect food sources for their young
74．The author answers the question raised in the first paragraph withB
A．stories and explanation
B．facts and descriptions
C．examples and conclusion
D．evidence and arguments
75．What can he inferred from the last sentence in the passage？B
A．Overheating the earth can be stopped
B．Not all animal species are so adaptable
C．The planet will become hotter and hotter
D．Not all animals are as smart as desert elephants．
分析 本文介绍了一种可以抵御炎热天气、干旱缺水的沙漠大象．
解答 73．A．推断题．根据第四段"Desertelephants are careful feeders-they seldom root up treesand break fewer branches"可知他们被叫做"小心的觅食者"是因为他们很少破坏树木．故选A．
74．B：归纳题．第二段是回答第一段提出的问题，指出纳米比亚西南撒哈拉沙漠沙漠象可以做到在沙漠环境生存．所以回答的方式是用事实和描述．故选B．
75．B：推理题．最后一句As we continue to overheat our weak planet，it can only be hoped that other animal species will adapt（调整．适应） as extraordinarily well to change as the desert elephant指出如果地球再持续过热，只能寄希望于其他动物物种也能像沙漠象一样适应极端环境，隐含义是其他动物物种不可能适应那种环境．故选B．
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