form a suitable platform for the adsorbent. And silica gel should also keep condition as wet or s ... will be lost. And this is also keep columns never be allowed to go dry.Q2. What is purpose of switching ... using the stationary phase and mobile phase by the principles of different polarity by moving speed
dodo아주 죽어서완전히 쇠퇴하여As hard as iron굳은, 몹시 엄격한 (철)As dead as muttonAs dry as a bone바싹 마른 (뼈)As blind as a ... poisoning미나마타병=수은중독As strong as an ox기운이 매우 센 (소)As quiet as a mouse아주 조용히 (쥐)As mad as a wet hen미친 (젖 ... in the dumps슬퍼 보이는Like a bear with a sore head매우 기분이 언짢거나 성깔이 사나운 사람을 묘사할 때Play cat and mouse with