脓性指头炎切开引流的指征是
A.有波动感
B.搏动性跳痛
C.明显红肿
D.手指功能障碍
E.高热
参考答案:B
I often see light in that empty house. Do you think I ____ report it to the police? [ ]
A. should
B. may
C. will
D. can
螺栓联接的防松方法有()。
A.摩擦力防松
B.机械防松方法
C.其他防松方法