事故严重度用事故后果的( )表示。
A．经济损失
B．事故等级
C．人员伤亡
D．事故性质
参考答案：A
解析：事故严重度用事故后果的经济损失(万元)表示。
The first edition ________ in 1955 and ________ a best seller ever since. [ ]
A. was published; had been
B. was published; has been
C. has been published; has been;
D. had been published; had
火热内生的成因中，以下哪一项是不确切的：
A.火热内侵，实热内盛
B.情志郁结，气随化火
C.精血亏少，虚热内生
D.外感寒湿，久郁化火
E.饮食积滞，郁久化火
