气的流通障碍称之为（）
A．气滞
B．气闭
C．气脱
D．气陷
E．气逆
参考答案：A
Rolls-Royces is ranked fourth in the list of best cars．The Browns already have two and now they are buying third．
A．the ; the
B．不填; a
C．the ; a
D．不填; the
