We must stress that these payment terms ( )very important to us.

A．be

B．being

C．been

D．are

下列各项，不属于抽动障碍病机的是（）

A.气郁化火，引动肝风

B.脾虚痰聚，肝风夹痰上扰

C.水不涵木，虚风内动

D.气郁化火伤津，筋脉失养

E.脾肾阳虚，不能温煦筋脉