老年抑郁症的临床表现是（）
A.自我评价低
B.兴趣丧失
C.睡眠障碍
D.性欲明显降低
E.以上均是
参考答案：E
Honestly speaking, I would agree with Shirley, though not ______.
A．entirely
B．widely
C．possibly
D．eventually
低流量吸入麻醉时新鲜气流量应（）
A.<5L/min
B.<4L/min
C.<3L/min
D.<2L/min
E.<1L/min
