We would like some meat and fruit _____ lunch. [ ]
A. to
B. in
C. of
D. for
答案:D
选前准备包括破碎、磨矿和脱水。
()打眼深度不受巷道断面限制
A、楔形掏槽
B、直眼掏槽
C、锥形掏槽
D、圆形掏槽