中毒性肺炎休克早期常表现为（）
A.烦躁不安
B.反应迟钝
C.意识模糊
D.嗜睡
E.昏迷
参考答案：A, B
The possibility __________ pleasant smells might reduce pain has recently been suggested by new research.
A．where
B．what
C．which
D．that
