Which four of these statements are restrictions for Frame Relay PVC bundles with QoS support for IP and MPLS? ()
A PVC bundle will not come up unless all the precedence, DSCP, and EXP levels are configured in thebundle.
B. A PVC bundle can perform precedence and DSCP matching at the same time
C. A PVC bundle may contain no more than sixteen PVCs
D. A PVC can be in only one PVC bundle
E. A PVC bundle cannot perform precedence and DSCP matching at the same time.
F. A PVC bundle may contain no more than eight PVCs.
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放置滚杠的时候要将四个指头放在滚杠孔内,大拇指放在孔外,以免压伤手指;在操作的时候不准戴手套,以防将手绞入压伤。
A. 正确
B. 错误
胶印机止常停机不得使用急停键。
A. 正确
B. 错误
文化教育学的代表人物是( )
A. 梅伊曼、拉伊
B. 狄尔泰、斯普朗格
C. 杜威、克伯屈
D. 鲍尔斯、金蒂斯
下列行为中,不会导致宿舍火灾的是()。
A. 在蚊帐内用冷光灯看书
B. 在床上吸烟
C. 乱扔烟头
D. 乱接电源