在对投资方案进行经济效益评价时，对寿命期不同的互斥方案进行比较时可选用 ()。

A．A

B．B

C．C

D．D

A．A

B．B

C．C

D．D

A．Init

B． 2Way

C． ExStart

D． Exchange

A. RTA will not establish an OSPF adjacency w ith RTB

B. RTA will send OSPF hello packets, but will not send OSPF updates

C. RTA will not accept OSPF hello packets from RTB

D. RTA will send OSPF updates, but will not establish an adjacency with RTB

A.The NProuter has two OSPF neighbors in the "Full" adjacency state

B.The NProuter serial0/0 interface has the OSPF dead timer set to 10 seconds

C.The NProuter serial0/0 interface has been configured with an OSPF network type of "pointtopoint"

D.The 10.1.1.1 and 10.1.1.2 routers are not using the default OSPF dead and hello timers setting

E.The "Mismatched" error is caus ed by the expiration of the OSPF timers

A. area IDs

B. process IDs

C. router IDs

D. hello timers

A. TK1# show ip ospf interface

B. TK1# show ip ospf priority

C. TK1# show ospf neighbor detail

D. TK1# show ospf processes

E. TK1# show ospf neighbor state

A．microtubule

B．microfilament

C．IF

D．spindle body

According to the passage, which of the following factors could influence dust formation？

A．humidity of asbestos that is used

B．the state and type of asbestos

C．ways people use asbestos

D．weather