Protection of cargo against tainting damage can best be obtained by（）.

A . Safey helmets B . Goggles and spectacles C . Breathing apparatus D . Glove

A . Double drive failure in an array and extremely high data fault tolerance B . Double drive failure in an array and more total storage capacity than RAID-5 C . Extremely high data fault tolerance and higher performance than RAID-5 D . Higher performance than RAID-5 and more total storage capacity than RAID-5

A、stop valves B、pressure relief valves C、balance valves D、regulating speed valves

A . Safety helmets B . Buoyancy aids C . Breathing apparatus D . Immersion suit

A . increases as the cargo closes the head while hoisting B . increases if the cargo runner is doubled up C . decreases as the boom is topped to a greater angle D . is determined by the thrust stresses on the boom

A . Safety helmets B . Goggles and sepctacles C . Breathing apparatus D . Gloves and safety boot

A . Safety helmets B . Goggles and sepctacles C . Breathing aparatus D . Safety suit

A . lsattr B . lspv C . lsvg D . lsresource

A . after its arrival at the destination B . during the ship's voyage at sea C . before they come to the dock D . during the time when the loading or diacharging is going o

A．A.nprotection clock B．B.nforced switching C．C.nmanual switching D．D.nclear

The first is called the "tank test". A modem airplane must fly very high in the sky. Air must be pumped into the plane so that the passengers can breathe. The metal structure (结构) of the plane has to be very strong for this reason. When the plane is filled with air, the air presses against the skin of the plane inside. The pressure (压力) on a small window is like a huge foot that is trying to get out. If a small part of the plane were to fail, the plane would explode in the sky. To test the structure of the plane, the plane is lowered into a huge tank or container of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is high up in the air. Finally, there is an explosion. This does not cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane has broken. Then that part is made stronger. The most dangerous test happens when the new plane is going through test flights in the air. The test pilot must find out exactly what happens when the engines(发动机) are all shut off at once. The plane begins to fall like a stone. It is the pilot's job to find out how he can get control of the plane again. These two tests are examples of how planes are made safe before they ever carry passengers. By doing the "tank test", the engineers can find out______. A．the amount of air in the plane B．the strength of the plane structure C．the pressure inside and outside the plane D．the power of the airplane engines

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。

A.Device level protection involves main control switch board protection, power board protection and TPS protection. If possible, configure a protection board for each of them. B.LSP linear protection, PW dual homed protection and ring network protection can be adopted on site for network side protection. C.LACP protection usually applies to devices at core layer. D.Switching in all protection modes supported by ZTE's devices can be implemented within 50ms.

A．A.LOC alarm B．B.Mismerge alarm C．C.Forced switching command (FS) D．D.Manual switching command (MS)

For application of PTN devices,()protocol of path protection and SNC protection should be the same.Only bidirectional protection switching needs()protocol.APS