they invented the abacus. Some researchers consider the invention to be the world's oldest"calculator""可知,世界上最早的计算器是算盘。 故选C。 【小题2】 推理判断题。根据文章第三段描述“Eachrod(竿)stands for adifferentdigit(数位).The ri
答案:解析: 1.times 2.ways 3.as 4.However 5.tens 6.consists 7.With 8.first 9.invention 10.calculate 11.abacus 12.represent 13.bottom 14.square 15.powerful 16.living 17.calculator 18.amazing 19.calculating 20.program 解析 暂无解析 扫码...
of the first calculating machines was an abacus.Abacuses are so fast and accurate that people still use them today.On the abacus in the picture,the beads on the wires represent ones,tens,hundreds and thousands starting from the bottom wire.The picture on the right shows a ...
Action Research on the Effects of English Picture Books on Pupils´ Reading Decoding Ability 热度: PictureEnglish CAKE ICECREAM FRUIT WINE CHEESE VEGETABLES abacus accordion airconditioner apples apricots audiocassette avocados backgammon bagel ball ...