入夏后肉汤易变质，最合理的保鲜方法是 [ ]
A．煮沸、开盖冷藏
B．煮沸、加盖冷藏
C．不煮沸、开盖冷藏
D．不煮沸、加盖冷藏
答案：B
The wind is blowing ______ outside. You'd better stay at home. [ ]
A. hard
B. big
C. large
D. huge
简述疔疮的病因病机。
