活跃期包括加速期及减速期两个阶段。()
参考答案：错
气管内导管套囊应充多少容量气体（）。
A.3～4ml
B.5～6ml
C.7～8ml
D.9～12ml
E.充气至吸气和呼气时刚好不漏气为准
I have a lot of readings_______ before the end of this term.[ ]
A. completing
B. to complete
C. completed
D. being completed
