A.(1)>(2)>(3)>(4) B.(3)>(1)>(2)>(4) C.(1)>(3)>(2)>(4) D.(2)>(3)>(4)>(1)
A.加水 B.混勻 C.制粒
A.磁鐵礦 B.赤鐵礦 C.菱鐵礦