When the river freezes over, we can walk across on the ice.河流结冻时, 我们可以踏冰穿过河面.Water freezes when the temperature falls below 0℃.温度降至摄氏零度以下时水就结冰.He says he'll sit there until hell freezes over before he'll pay th...
HPLC method for determination of ciprofloxacin hydrochloride and hydrocortisone in compound ciprofloxacin hydrochloride eardrops was established.建立了复方盐酸环丙沙星滴耳剂中盐酸环丙沙星与氢化可的松的HPLC测定法.Methods: The hydrocortisone probe was u...