非要式合同

A priority of 0 will prevent a router from becoming a DI
B. If the DIS becomes unavailable the backup DIS is promoted to DI
C. Adding a router with a higher priority than the current DIS will result in the new router becoming DI
D. Separate L1 and L2 election processes are held on a brodcast network.
E. L1 routers on a broadcast network only establish adjacencies with the DI
F. If there is a tie based on priority，the router whose attached interface has the lowest MAC address becomes the DI

A. 离合器分离不彻底
B. 离合器发抖
C. 离合器打滑
D. 离合器异响

A. 正确
B. 错误