通常用于化合物有效成分提取的方法有()
A.溶剂法
B.液-液萃取法
C.pH梯度萃取法
D.水蒸气蒸馏法
E.升华法
参考答案:A, D, E
完成课文原句(共5小题,10个空,每空0.5分,满分5分)
小题1:_A young woman sits alone and is ________ ________ ________.
小题2:_ People ____ _____ the dead person ______ _______ would make these offerings on
special days and during festivals.
小题3:_ Biarni was hoping to join his father who was Eric, but he was blown off course and ________ _________ in an __________ world.
下列哪项在巡检记录过程中需要记录机泵电流()。
A、消泡剂泵
B、冲洗油泵
C、封油泵
D、凝缩油泵