反应汽提蒸气量有()决定。
A、催化剂循环量
B、汽提段藏量
C、沉降器藏量
参考答案:A
Read and write. 你知道下面日期分别是什么节日吗?
例:January lst New Year's Day March 8th June lst
September 10th October lst December 25th
May lst
线路有效长 effective length of track