g 对硝基甲苯在 100 125 °C 一磺化时,设 π 值为 82 , 试计算 20% 发烟硫酸的用量
the hexadecimal number system has 16 characters , six of which are alphabetic characters()
我国历史上第一部国别体史书是 ,第一部编年体史书是 。 ()
Laurence Sterne s fame rests chiefly on his two books, ______and A Sentimental Journey,espLaurence Sterne s fame rests chiefly on his two books, ______and A Sentimental Journey,esp. the former.