过熟烟叶,一般应装在烤房的()棚。
参考答案:底
If better use is ____ of your spare time, you'll make great progress in it. [ ]
A. spent
B. made
C. taken
D. thought
下列材料中可用于配制耐热混凝土(900℃)的是()。
A、矿渣水泥
B、硅酸盐水泥
C、普通水泥
D、高铝水泥