The abacus was invented in the sixth century by Chinese people.The umbrella was invented about 4000 years ago in Assyria,China and Egypt.The binoculars was invented in 1854 by Ignatio Porro in Italy.The camera was invented in 1827 by Joseph Nicephore Niepce who took the first picture.The bicycle was invented in 1880s in England.
最新问答： “7:00我们去接新娘”用英语怎么写 物极必反”是谁最先说的话?1、老子2、庄子3、墨子4、孔子 如何提高个人理解能力?表达能力?分析能力? “我想要和你永远在一起，不分开，直到天荒地老”的英文是怎样的 1个硫酸分子 用化学符号怎么表示? 求老师解答：London will hold _ 怎么列一元二次方程,我这样列对没? 朱自清《绿》 《荷塘月色》 《背影》的体裁都是游记吗? 烟味的英语单词是多少 Sorry,I think I can't be with you!Because I'm not ready!So s 忘怀的反义词 圆A,圆B的半径都为2,AB=6,则圆心在直线AB上且与两圆都相切的圆有几个?分别求出这些圆的半径? 组词，例:静悄悄，组六个词语 you must be ET``````right 找规律3 6 9 14 19 25 33 45 55 69..后面的变化太诡异,哪个高人帮我找下规律啊~ What__________to the wedding next week?A.are you wearing B.a 火星上有什么东西 下列关于组成细胞的化合物的叙述，错误的是（ ） 英语近反义词各10组 小明家5月份用电250千瓦时,其中用“峰电”150千瓦时,用谷电100千瓦时.请计算他们家使用峰电电价
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