加氢装置停工降温操作时,应控制好降温速度,避免太快。
参考答案:对
Directions:
You are in charge of a dining hall in a university. You received a few letters complaining about the crowded condition of your dining hall. Write a letter to one of the complainers to
1) acknowledge the complaints,
2) suggest alternatives to avoid the crowdedness, and
3) express your appreciation for the comments.
Do not sign your own name at the end of the letter. Use "Li Ming" instead.
Do not write the address.