痹证中若肢体关节酸痛，游走不定，属行痹者，治疗首选方剂为（）
参考答案：防风汤
—Who helped Jessie with her English?
—_______, she taught herself. [ ]
A. Anybody
B. Somebody
C. Nobody
D. Everybody
半圆的周长=圆周长÷2______．
