边长是4分米的正方形的面积是______.
4×4=16(平方分米),
答:面积是16平方分米.
故答案为:16平方分米.
Quantities of precious jewelry_____ buried_____ in the earth.
A.was found; deeply
B.were found; deeply
C.was found; deep
D.were found; deep
当采用汽车运输时,堆煤场贮存锅炉房( )最大耗煤量。
A.可磨 B.难磨 C.易磨 D.中等可磨