浓硝成品酸中亚硝酸主要产生在（）内。
A.浓缩塔
B.漂白塔
C.加热器
D.汽液分离器
参考答案：B
—Where's the dresser?
—___________. [ ]
A. It's my drawer
B. It's very nice
C. It's in the bedroom
D. Thank you
液压传动的优点？
