In ZTE's T-MPLS protection, which of the following external commands are supporte

A . PV valves B . warning signs C . flame screens D . stop-check valve

A . cisco aironet 1500 series B . cisco aironet 1400 series C . cisco aironet 1300 series D . cisco aironet 1200 serie

A . blow out coils B . governor relay C . under voltage trips D . reverse current tri

A . Safety valves B . Water tubes C . Steam stop valves D . Blow down valve

A . asphyxiation from CO B . loss of air in the sides of the raft C . rough seas D . cold water temperature

A . The funnel B . The messroom C . The galley D . The satellite anternna

A . dried，and stowed in a place with adequate ventilation B . stowed in a hot，moist compartment C . stowed on deck at all times D . stowed in any compartment

A . NOT contain more than 200 pounds of CO B . be automatically operated by a heat actuator C . have an audible alarm D . All of the above

A．image B．imagine C．imagination D．imaginable

A．Tunnel 1+1 B．Tunnel 1：1 C．SNCP 1+1 D．SNCP 1：1

A.PW dual-homing protection is usually used for protection between networks; tunnel protection is usually used to protect the inside of PTN network; B.Neither PW dual-homing nor tunnel 1:1 switching needs APS negotiation. C.PW dual-homing switching has one more trigger condition -- CSF than tunnel protection switching. D.PW dual-homing has less OAM detection points than tunnel protection, which saves device resources. 此题为多项选择题。

Economy () and environment protecting are two main issues in the world. In these two aspects, many () counties like the USA also have the same problems as countries. (develop)

此题为判断题(对，错)。

A.nIn 1+1 T-MPLS path protection structure, each working connection has a specific protection connection; working connection and protection connection are bridged at source end of protecting domain. B.nIn 1+1 T-MPLS path protection structure, if a unidirectional fault (transmission direction from node A to Z) occurs to working connection, it will be detected at sink node Z of protecting domain and then node Z selector will switch to protection connectio C.n1+1 T-MPLS path protection is of unidirectional switching type -- that is to say, only the affected end needs to switch to the protection path and selectors at the two ends are relatively independent. D.nIn 1+1 T-MPLS path protection structure, to avoid single-point fault, working connection and protection connection should run along isolated routes. 此题为多项选择题。

是 否

A．A.MPLS B．B.OAM C．C.APM D．D.APS

There is a(n)()need for env ironmental protection in industrialized areas of this country. A.pressed B.impressive C.pressing D.necessary

A. slight B. surprising C. sudden D. harmful

A、is being held B、to be held C、held D、being held