放空气吸收塔吸收放空气具备什么条件?
参考答案:
①放空气吸收塔已引入贫吸收液;
②放空气吸收塔塔釜泵已启动并已改通至富吸收液流程;
③放空气吸收塔压力自动设定在设定值。
“Have ________ try, you are so close to the answer,” the teacher said to Eric.
A.the other
B.one another
C.other
D.another
竹亚科植物普通叶片脱落时,留在茎上的部分是()
A.箨舌
B.箨耳和叶鞘
C.叶鞘
D.叶柄