首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Salt is as necessary to life as water. In many areas of Africa people once drank the urine (尿) of animals because they had no ot
Salt is as necessary to life as water. In many areas of Africa people once drank the urine (尿) of animals because they had no ot
admin
2014-08-25
33
问题
Salt is as necessary to life as water. In many areas of Africa people once drank the urine (尿) of animals because they had no other source of salt. Without salt, human beings die.
The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys (肾) and sweat glands (腺). It then tries to adjust to this loss by speeding up its secretion (分泌) of water. (78)
In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst.
In cases where there is little or no water to drink, the body tries to do the opposite thing. Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body’s normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.
Some African people once drank animal urine______.
选项
A、when they were going to die
B、because they were thirsty
C、because there was little salt
D、because they were short of water
答案
C
解析
文章第一段提到In many areas of Africa people once drank the urine(尿)of animals because they had no other source of salt.由此句可以看出,在非洲的许多地区,人们曾经饮用过动物的尿液是由于他们盐很少。别的选项都不符合题意。
转载请注明原文地址:https://kaotiyun.com/show/RUxO777K
0
成人本科学位英语
相关试题推荐
【B1】【B2】
Robertwasverystubbornandnobodycouldconvincehim______hismistakes.
Therearemanycommunitiesandpopulationswhichhavelostpreciousrecordsduetotragiceventssuchasthefireinthecourts
Modernmass—productionmethodslowerthecostofmakinggoods,andthusgiveusbettervalues.Atthesametime,Americaningenu
WhichofthefollowingstatementsaboutWashington,D.C.canbecorrectlyinferredfromthepassage?Itcanbeinferredthaton
Asamatteroffact,theoutstandingthingthathappenstobrightchildrenisthattheyareverylikelytogrowintobrightadul
Whatexactlyisalie?Isitanythingwesaywhichweknowisuntrue?Orissomethingmorethanthat?Forexample,supposeafri
亨利创作的艺术品在许多方面都比他弟弟的要好。
无论多忙,你都应该抽时间看望父母。
随机试题
下列关于SET与SSL的说法,不正确的是()
“改革开放”于()被写进了党章和国家宪法。
全球引起关注要求防治的主要热带病是
中医学认为人的精神与
黄某意图杀死张某,当其得知张某当晚在单位值班室值班时,即放火致使值班室烧毁,其结果却是将顶替张某值班的李某烧死。下列哪些判断不符合黄某对李某死亡结果所持的心理态度?()(2002/2/50)
墙体应满足的基本要求主要有()。
根据《物权法》的规定,债务人或第三人可以抵押的财产是()。
以下不属于视频文件格式的是()。
张某涉嫌违法犯罪,被县法院判处有期徒刑6年。服刑期间,张某不服上诉,市中级人民法院改判其无罪,张某遂申请国家赔偿。下列说法错误的是()。
微机中访问速度最快的存储器是()
最新回复
(
0
)