补骨脂中的成分主要是
A．简单香豆素B．呋喃香豆素C．新木脂素D．联苯环辛烯型木脂素E．简单木脂素
参考答案：B
The signaling mechanisms used by a steroid-hormone(固醇激素) receptor and by an ion-channel-linked receptor have very few components(组分). Can either mechanism lead to an amplification of the initial signal If so, how
终身教育思想是由( )提出来的
A．布鲁纳
B．保尔·朗格郎
C．马里坦
D．马斯洛
