液硫通过液硫计量泵输送到燃硫炉点火器上,接触到()后硫磺被点燃。
A.耐火球
B.工艺空气
C.电热管
D.燃硫炉壁
参考答案:C
Do you _____ a cat _____ a pet at home? [ ]
A. have, as
B. keep, for
C. keep, as
D. Both A and C
B2C网站的网上购物的后台处理主要流程流程:一般是网上客户订单→订单受理→库存查询→销售单生成→出库确认→发货确认→结账。( )