分馏塔底重沸炉进料中断后首先应该确认（）
A、产品质量是否合格
B、塔顶回流是否正常
C、重沸炉主火嘴是否熄灭
D、塔底产品泵运行是否正常
参考答案：C
Which of the following statements regarding the speed at which analysts believe stock prices reflect new information is most likely accurate（）
A. Technicians believe that prices adjust quickly to new information.
B. Both technicians and followers of the efficient market hypothesis believe prices adjust slowly to new information.
C. Followers of the efficient market hypothesis believe prices adjust quickly to new information.
管道基础宽（）cm以下时，其沟底宽度应为基础宽度加30cm（即每侧各加宽15cm）。
A、64
B、65
C、66
D、63
