天然药物化学成分提取最常用的提取方法是
A.水蒸气蒸馏法
B.升华法
C.超临界流体萃取法
D.溶剂法
E.吸附法
参考答案:D
As soon as the film star ______ from her seat and ______ her hand to welcome her fans, cheers from the audience ________.
A.rose, raised, arose
B.raised, rose, arose
C.raised, arose, raised
D.rose, arose, raised
奎尼丁降压低自律性是由于()
A、促进4相钾外流
B、抑制4相钠内流
C、抑制慢反应细胞的钙内流
D、β受体阻断