Some acids are strong enough to burn the wood.有些酸的酸性强得可以烧坏木头.There are many amino acids that the body cannot synthesise itself.有许多种氨基酸人体自身不能合成.How do acids react on metals?酸对金属会起什么样的化学反应?...
The quilt has pretty, scalloped edges and intricate quilting.这条被子有漂亮的荷叶饰边，而且绗缝活做得也很精致。Mary saved up pieces of cloth to make a quilt.玛丽存了几块布留作棉被用.The design on this quilt cover is quite elegant.这被面的花儿很大方....
汞的化学元素符号是什么？What's the chemical symbol for mercury?有些窃贼用汞水腐蚀他们的镣铐.Some thieves have eaten off their irons with mercury water.添加的甲基汞的回收率据报到达90%左右.The recovery of added methylmercury was reported to be approximately 9...
He delivered one of his longest and most important speeches at Pueblo, Colorado, on September 25.9月25日,他在科罗拉多的普韦布洛发表他最长而且最重要的演说之一.In 2003, the city of Pueblo , Colorado passed a law making public places and workplaces sm...