出光面冷却壁、镶砖冷却壁、支梁水箱在高炉内的使用部位?
参考答案:
光面冷却壁用于炉底、炉缸;
镶砖冷却壁用于炉腹、炉腰、炉身;
支梁式水箱用于炉身中上部。
Zhai Zhigang, LiuBoming and Jing Haipeng went into space on .
Their flight around the earth lasted about _____ hours. [ ]
A. September 24, 2008, 67
B. September 25, 2008, 68
C. Semtember 26, 2008, 69
D. September 27, 2008, 70
大多数慢性胃炎的主要病因为()
A.药物
B.食物
C.胆汁反流
D.幽门螺杆菌
E.物理因素