用开炼机塑炼橡胶时,橡胶必须在()一侧投入。
参考答案:靠近大驱动齿轮
The World Expo was like ________ great stage for cultural exchange, bringing people into closer contact with ________ rest of the world.[ ]
A.a; /
B.the; /
C.a; the
D.the; the
开机时显示如下出错信息:Non-systemdiskordiskerrorReplaceandstrikeanykeywhenready.则表示()。
A、计算机硬件损坏
B、非系统盘或磁盘坏了,更换磁盘后再试
C、磁盘驱动器坏了,请更换
D、没有磁盘驱动器,请安装