收费公路经营管理者应当加强对收费站工作人员的(),收费人员应当做到文明礼貌,规范服务。
A、业务培训
B、职业道德教育
C、队列训练
D、基础训练
参考答案:B, C
George's records _______ very successful after the Beatles. [ ]
A. was
B. were
C. are
D. is
消化道衰竭的首发症状为()
A.出血
B.腹泻
C.呕吐
D.便秘
E.食欲缺乏