单选。
What's the like in Beijing?[ ]
A. sweater
B. weather
C. wear
答案：B
She felt rather _______that she should drive the car at such a________ speed．
A．frightening, frightening
B．frightened, frightened
C．frightening, frightened
D．frightened, frightening
23岁男性，曾因服格鲁米特（导眠能）过量住院，行气管插管和机械通气。出院后，有进行性呼吸困难6周，肺功能试验异常最可能为（）
A.最大吸气压（MIF.
B.最大呼气流速（PEFR）
C.吸气和呼气最大流量曲线
D.动脉血氧分压
E.一氧化碳弥散量
