鹿角具有而鹿茸不具备的是（）
A.性味咸温
B.归肝肾经
C.强筋健骨
D.补肾助阳
E.活血消肿
参考答案：E
He was always _______ for knowledge, and at last became an expert in the field of art.
A．fond
B．content
C．brave
D．greedy
低水平放射性测量时为把简化优质因子提高100倍，本底计数率应降到多少（设其他参数不变）（）
A.1/10
B.1/30
C.1/50
D.1/100
E.1/200
