催化裂化装置的主要组成部分?
参考答案:
(1)反应-再生系统,
(2)分馏系统,
(3)吸收稳定系统,
(4)主风机系统,
(5)气压机系统,
(6)余热回收系统。
Realizing that he would be late for school, little Tom had ___of the bread prepared by Mum and hurried out.
A.nothing
B.all
C.neither
D.none
下列对放射性碘的描述,哪一项不正确
A.广泛用于检查甲状腺功能
B.易致甲状腺功能低下
C.不宜手术的甲亢治疗
D.手术后复发应用硫脲类药物无效者
E.单纯性甲亢