分馏岗位的关键控制点分别为()。
参考答案:R—201液面;塔底液面;R—201入口温度;塔顶温度
以下哪个结构对保持大脑醒觉状态起重要作用()
A.丘脑
B.下丘脑
C.脑干网状结构
D.小脑
E.海马
—Thank you very much for everything. You’ve been so helpful.
—_____. Just let me know if there’s anything else I can do for you.[ ]
A. With pleasure
B. No, thanks
C. Please don’t say so
D. My pleasure