除哪项外，均是秦艽的功效（）
A.祛风湿
B.止痹痛
C.利水消肿
D.退虚热
E.清湿热
参考答案：C
已知抛物线y2=-4x上一点A到焦点的距离等于5，则A到坐标原点的距离为______．
_____ is at school now. [ ]
A. The men
B. The people
C. Everyone
D. Who
