现浇水磨石地面施工中,分格条粘嵌好后,经()即可洒水养护,一般养护()。 ["A、24h;3-5d","B、12h;3-5d","C、10h;2-3d","D、8h;5-7d"]
鲁滨逊写的“利害差异表”有何意义?
用pH玻璃电极测定pH=5的溶液,其电极电位为+0.0435V,测定另一未知试液时,电极电位则为+0.0145V。电极的响应斜率为58.0mV/pH,此未知液的pH值为()。 ["A、4.0","B、4.5","C、5.5","D、5.0"]
既能舒筋化湿,又能和胃生津的药物是()。 ["桑寄生","桑枝","秦艽","木瓜","蚕沙"]
SDH设备采用()映射。 ["异步映射","字节同步映射","浮动VC模式","字节间插同步复用"]
鲁滨逊是如何计算日月的?