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
What is this passage mainly about?
What is this passage mainly about?
admin
2010-06-30
65
问题
What is this passage mainly about?
Scientists say sharks have lived in the world’s oceans for millions of years. They also say there are more than 350 different kinds of sharks.
Sharks do not have bones, and a shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals. These powerful senses help them find their food. Some sharks will eat just about anything. Many unusual things have been found in the stomachs of some tiger sharks. They include shoes, dogs, a cow’s foot and metal protective clothing.
About 40% of the different kinds of sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies like humans do.
Scientists are beginning to understand the importance of sharks to humans. Medical researchers want to learn more about the shark’s body defense system against disease. They know that sharks recover quickly from injuries. Sharks appear never to suffer infections, cancer or heart diseases.
选项
A、Their tasty meat.
B、The principle of their defense system against disease.
C、Their solid skin.
D、The principle of their birth modes.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/ZXJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Howdowemeasuretheeconomicreturntohighereducation?Typicallyitiscalculatedasthedifferencebetweenaveragewagesof
Iwasnotmorethanthirteenyearsoldatthetime,(31)______,butIrememberthemomentasifit(32)______yesterday.Ihadj
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Onedayagroupofpeoplewalkedintoacaveandpaintedhandprintsalloverthewalls.Tenthousandyearslater,archaeologists
Youhavereadanarticleinamagazinewhichstates,"Withtheever-increasinghousepricesinbigmetropolises,itisbetterf
Whendidthewomangiveupsmoking?
ENow,I’dlikeyoutotalkaboutsomethingbetweenyourselves.Youshouldtakecaretosharetheopportunityofspeaking.
Wednesday
Aone-monthsurveyresultsindicatethatsmoking,alcoholandmarijuanauseincreaseamongresidentsofManhattanduringthefiv
Wednesday
随机试题
Sturge-Weber病主要表现为
患者男性,40岁。因气喘、呼吸困难半年,加重1个月入院。1个月前在外院诊断为哮喘,经抗炎、解痉、平喘治疗,效果不明显。体检:双肺可闻及吸气相喘鸣音。为进一步明确诊断,首选以下哪项检查
男,33岁,干活时突发呼吸困难,右胸痛,发绀,大汗,既往有肺结核史按发病机制属哪型呼吸困难
关于影响女子胞功能的生理因素,下列描述错误的是
颞下颌关节区有破碎音的是
(2011年案例分析第81—85题)金榜公司、科巨公司于2003年共同出资设立金科商贸有限公司(以下简称金科公司),注册资本5000万元。至2009年。金科公司出现财务危机,资不抵债,现金流严重不足。其主要债务情况如下:(1)拖欠职工工资累计达800万元。
你认为最重要的样品是什么样()
试述在对儿童进行独立自主性培养中,教师容易忽略的问题及解决策略。
清退工作的意义在于()。
近代中外历史告诉我们,群众的民主权力就像一切个人权力一样,当它没有受到__________的宪政约束时,很容易转变为它的反面,成为一种暴虐的权力。因此,许多思想家对于各种群众领袖挟民意而行独裁的负面作用__________。依次填入画横线部分最恰当的一项是
最新回复
(
0
)