下列哪种病最易引起小腿丹毒（）
A.足部挫伤
B.脱疽
C.足癣糜烂
D.足部疔疮
E.下肢静脉曲张
参考答案：C
________ with so much trouble, we failed to complete the task on time.
A．Faced
B．Face
C．Facing
D．To face
刻度极化补偿器有哪些主要用途？
