呢日係我地一齊既第16日. 呢日我戈頭痛到好似醉左咁:(so sad... 您係咁叫我睇醫生..但我真係好五中意醫生:( 您send左條數俾我.可惜我五識.要您計返俾我睇.. 9x-7i>3(3x-7u) 9x-7i>9x-21u -7i>-21u 7i<21u i<3u