【单选题】Chinese are looking for ways to learn English well.
【单选题】_______ Chinese are looking for ways to learn English well before Beijing 2008 Olympic.
【判断题】液相色谱法 以溶剂或某种溶液为流动相,以装在柱子里的固体为固定相,用高压输液泵将流动相压入柱子,使样品组分在柱子里进行分离的柱色谱法。
【多选题】HPLC :以溶剂或某种溶液为 [填空(1)] ,以装在柱子里的固体为 [填空(2)] ,用高压输液泵将流动相压入柱子,使样品组分在柱子里进行分离的柱色谱法。
【单选题】( )6. Chinese are looking for ways to learn English well.