应看作是中毒患者危重信号的表现是（）
A.昏迷
B.脉搏增快
C.情绪激动
D.肺水肿
E.心律失常
参考答案：A, D, E
A small plane crashed into a hillside five miles east of the city,_____ all four people on board. [ ]
A. killed
B. killing
C. kills
D. to kill
