如虚拟一个Windows7的系统安装，常用参数如下：　　qemu-kvm -m 1024 -localtime -M pc -smp 1 -drive file=Windows7_x86.img,cache=writeback,boot=on -net nic,macaddr=52:54:00:12:34:80 -net tap -cdrom Windows7.iso -boot d -name kvm-win7,process=kvm-