抽提装置停进料，首先应（）
A、芳烃、非芳改入中间罐
B、抢修泵
C、再生塔停工
D、汽提塔改单塔循环
参考答案：D
焦煤的挥发分比肥煤高。
Miss Wilson, whose parents are____ working in China, is studying in Peking University now.
A．either
B．all
C．both
D．no
