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...
The foreman passed slowly along, eyeing each worker distinctly.工头慢慢地走过来, 打量着每个工人.Behind his back he could feel everyone eyeing his blue overalls.他可以觉察到背后人人都在看他的蓝制服." You can't do it, you know,'said the detectiv...
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?...