铁矿石包括天然矿和()。
参考答案:人造富矿
Those relatives were________ people. After a few days, I was getting________ and homesick.
A.boring; boring
B.bored; bored
C.bored; boring
D.boring; bored
以下选项中,()不是磁盘存储空间的常用管理方法。
A.位示图
B.记录的成组操作
C.空闲块表
D.空闲块链