单项选择题
A.采用外取热盘管 B.采用内取热盘管 C.采用蒸汽换热器 D.采用循环水换热
A.C+0.5O2→C O B.ZnS+1.5O2→Zn O+SO2 C.2H2＋0.5O2→H2O D.Zn3O（SO4）2+8H2→2ZnS+ZnO+8H2O
A、R-S＋Ni＋H2→R-2H＋Ni S B、2 H2＋0.5O2→H2O C、C16H34→C8H16＋C8 H18 D、R S H＋H2→R H＋H2S