In terms of class, digital divide exists among distinct types of employees and involving the higher and Center courses plus the lessen course.passageway通道;cavity洞，凹处;cylinder汽缸;orifice孔口;corridor门厅，走�?cylindrical圆柱形国王的墓室位于金字塔的中心，只有通过大走廊和一个上升的通道才可以到… Read More