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(糞便)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(調(diào)整.適應(yīng)) 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 本文介紹了一種可以抵御炎熱天氣、干旱缺水的沙漠大象.
解答 73.A.推斷題.根據(jù)第四段"Desertelephants are careful feeders-they seldom root up treesand break fewer branches"可知他們被叫做"小心的覓食者"是因為他們很少破壞樹木.故選A.
74.B:歸納題.第二段是回答第一段提出的問題,指出納米比亞西南撒哈拉沙漠沙漠象可以做到在沙漠環(huán)境生存.所以回答的方式是用事實和描述.故選B.
75.B:推理題.最后一句As we continue to overheat our weak planet,it can only be hoped that other animal species will adapt(調(diào)整.適應(yīng)) as extraordinarily well to change as the desert elephant指出如果地球再持續(xù)過熱,只能寄希望于其他動物物種也能像沙漠象一樣適應(yīng)極端環(huán)境,隱含義是其他動物物種不可能適應(yīng)那種環(huán)境.故選B.
點評 在做閱讀理解時,考生可快速閱讀短文,通讀測試題,明確考察點,在對應(yīng)細讀,加快做題速度.有時間還可以復(fù)查校對答案.