吸入性肺脓肿不易发生的部位是
A．左上叶后段
B．右侧下叶后基底段
C．双侧下叶背段
D．右上叶尖段
参考答案：D
Your mother is sleeping. You'd better _________. [ ]
A. not wake up her
B. not to wake up her
C. not wake her up
D. not to wake her up
