装载NFS服务器192.168.12.1的共享目录/tmp到本地目录/mnt/shere的命令是: ( )。 A: mount 192.168.12.1/tmp /mnt/shere B: mount –t nfs 192.168.12.1/tmp /mnt/shere C: mount –t nfs 192.168.12.1:/tmp /mnt/shere D: mount –t nfs //192.168.12.1/tmp /mnt/shere