一个圆锥的体积是10立方分米,高是6分米,它的底面积是______平方分米.
10×3÷6,
=30÷6,
=5(平方分米);
答:它的底面积是5平方分米.
故答案为:5.
—Talking loudly in a library is impolite.
—In fact, we should also take care not to cough or sneeze loudly in public.
A.look after
B.be careful
C.take care of
D.look up
地面无矿物加工的矿井生产系统,包括有()环节。
A.井口设施
B.井口筛选、破碎
C.装车仓库
D.储矿场地待选矿物储存场地