为了保持适当的火焰长度，φ2～4m的回转窑燃烧带气体流速控制在（）左右。
参考答案：1m/s
As soon as he comes back, I'll tell him when _______ and see him. [ ]
A. will you come
B. you will come
C. do you come
D. you come
除另有规定外，一般散剂水分不得超过（）
A.5.0%
B.9.0%
C.10.0%
D.12.0%
E.15.0%
