the abacus in the picture shows a number.就划线部分提问in the picture为划线部分------- -------shows a number?

In the past,people used ___ to calculate fast.(abacus) Do you know — In the 6th century.A.who is the abacus invented B.Do you know — In the 6th century.A.who is the abacus invented B.when the abacus is invented C.when was the abacus invented D.when the abacus was invented the abacus was invented （in the sixth century in china） 对括号部分提问 shows,the,picture,abacus,in,the,number,a把单词连成句子 the abacus was invented in the sixth century in china 划线部分提问划线部分 in sixth century inChina The abacus was invented in the sixth century by the Chinses帮我翻译这个句子.呵呵`. Write down the numbers on the abacus in （figures这个）（对划线部分提问）还有in The abacus was The abacus was invented in the sixth century by the chinese写篇作文,初三第九单元的SELF CHECK的那篇,求高手写篇, An abacus was_______（use）in people's everyday life in the past But it's almost_____now! did in times in same how people ancient count the way 连词成句还有do beads the wires an stand what the on abacus for of the abacus in the picture shows a number.就划线部分提问in the picture为划线部分------- -------shows a number? 英语翻译Science will have the last word,however,for the computers described in this book perform operations several million times faster than the best of the abacus experts. 1.he______(throw) the ball to me,and i caught it2.The population of the city has_______(rise)to five millionThe abacus was invented in the_______(six)century When were they invented and who invented them?具体看问题.For example :The abacus was invented in the six century by the Chinese.按照这个例句写umbrella binoculars camera bicyle~ 英语作文：Find out when these things wewe invented and then write about whemFind out when these things wewe invented and then write about themThe abacus was invented in the sixth century by the Chinese...续写 The computer is a useful machine.It is the most important invention in many years.The oldest kind of computer is the abacus(算盘),used in China centuries ago,but the first large,modern computer was built in 1946.A computer then could do maths probl 英语翻译The idea of a computer goes back to the invention of the abacus(算盘) in Asia Minor,more than 5000 years ago.More recently,there were developments in the past two centuries that are the foundation of what we call a computer today.there 英语翻译Computer is a useful machine.It is the most important invention in many years.The oldest kind of computer is the abacus used in China centuries ago,but the first large,modern computer was built in 1948.A computer then could do math proble