石灰水变得混浊了, 可见在实验中有二氧化碳生成了.The lime water has turned cloudy, therefore carbon dioxide has been produced during the experiment.墙已经用石灰水刷过了。The walls had been whitewashed.会形成二氧化碳.可用石灰水测试,石灰水会变成乳浊.Carbon dioxide will be formed...
Prisoners sometimes ease their captivity by endowing their jailers with extraordinary qualities.犯人有时表现出非常好的品德以取悦狱卒,以此改善他们的境遇.But instead of burying him, the jailers toss him into the sea.但不要埋葬他的狱卒扔到他救起.Their jailers dish...
There are many factors influencing spontaneous combustion in goaf and their relative essentialities are different.采空区自然发火的影响因素很多,各因素之间的相对重要性不同.The disease has an unpredictable course with exacerbations and spontaneous re...
采用1,4- 丁二醇 、 马来酸酐及十八醇为主要原料,合成出一种双子表面活性剂1, 4- 丁二醇双琥珀酸十八醇双酯磺酸钠.A new type gemini surfactant was synthesized from 1,4 - butanediol , maleic anhydride and 1 - octadecanol.研究了加入聚对苯二甲酸丁二醇酯(PBT) 对酚醛塑料的增韧改性.A phenolic resin was ...