极化电压较理论分解电压要高主要是受（）的影响。
参考答案：阳极过电压
NASA has made a ________ that our earth has no threat associated with the film 2012 which is based on pure myths.
A．clarification
B．classification
C．identification
D．presentation
甘草不能配用的有（）
A.甘遂
B.芫花
C.海藻
D.大戟
E.朴硝
