Chapter 4《The world of numbers》同步练习1（深圳牛津七年级上）.doc

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1、Chapter4Theworldofnumbers一．翻译下列短语1．古代____________________2.许多不同的方法_______________3．数字体系________________4.由……组成___________________5．计算器___________________6.计算_________________________7．一瞬间___________________8.能够_________________________9．一生_____________________10.人脑________________________二．完成下列

2、句子1．印度人首先发明并发展了1-9数字体系。后来他们又发明了零这个数字。TheIndiansfirst___________anddevelopedthe1___________9systemofnumbers.Thentheyinventedthez____________.2．（零的发现）使得写大的数字和计算变得更容易。Itmade_____________easier____________bignumbersandto_____________.3．现代的计算器可以计算加、减、乘、除，还可以算百分比和平方根。Themodern___________canadd,______

3、______,____________and__________.Itcanalso___________percentagesand_______________.4.电脑可以在一瞬间进行计算，而你有可能一辈子都算不出来。Acomputercandoa_____________ina___________,butyoumightnotbe___________todoinyour___________lifetime.5．一些人把人脑叫做活电脑。人脑比电脑更强大吗？Somepeople____________thebraina________________computer.Isa

4、humanbrainmore____________________________acomputer？三．短文填词ShakuntalaDeviisfromIndia.Shehasana___________(1)brainandcancalculatelikel__________(2).InAmerica,Shakuntalaandaverypowerfulcomputerweregivenaproblemtos__________(3).Shakuntala’sbraint_________(4)50secondstofindtheanswer.Thecomputertooka

5、m__________(5).However,beforethecomputercouldbeginc_________(6),someonehadtos________(7)manyhoursprogrammingitwithi________________(8).Noonehadtop___________(9)Shakuntala.Isyourbrainpowerfule__________(10)tobeagainstthecomputer?