单选题Waldeyer tonsillar ring是指（）A内环B外环C咽淋巴环D鼓环E气管软骨环
单选题
Waldeyer tonsillar ring是指（）
A
内环
B
外环
C
咽淋巴环
D
鼓环
E
气管软骨环
参考解析
解析：
暂无解析
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Third Mate, we’ll enter the harbour, you should ring “（）”now.A、Stand byB、Ring off engineC、Finished with engineD、Finish it
What are two characteristics of dual-ring interconnect in SDH networks？ （）A、 It protects signals against node failures between rings.B、 It protects signals against node failure within a single ring.C、 It allows for traffic to be preempted when a ring switch occurs.D、 Traffic can be dropped and continued at interconnecting nodes.E、 It protects preemptible traffic from being dropped when a ring switch occurs.
单选题The lowest ring of a piston is （）.Aa coil springBa sealing ringCan oil distributor ringDmain seal ring
单选题In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the（）Atop of the ring grooveBback of the ring grooveCbottom of the ring grooveDpiston ring end clearance
单选题In some diesel engine designs,（）the injection of cylinder oil is timed to impinge when the piston and only impinge on（）Ais coming upward；cylinder ring beltBis going downward；piston ring beltCis coming upward；piston ring beltDis going downward；cylinder ring belt
单选题A diesel engine piston ring face is in direct contact with the （）.Atop of the ring grooveBcylinder liner oil filmCbottom of the ring grooveDback of the ring groove
单选题How is SNCP and MS-SPRing traffic rerouted during a protection switch when a complete fiber cable cut occurs？（）A SNCP traffic is switched from the first node that recieves the AIS. MS-SPRing traffic is rerouted from the first in the ring.B SNCP traffic is selected at the destination node in the ring. MS-SPRing is rerouted from the originating node in the ring.C SNCP traffic is rerouted from the originating node in the ring. MS-SPRing traffic is rerouted from the originating node in the ring.D SNCP traffic is selected at the destination node in the ring. MS-SPRing traffic is rerouted from the last reachable node in the ring.
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单选题If the gas pressure behind the ring is built up too slowly, and thereby exerts an inadequate outward pressureIn such a case, the combustion gas can penetrate between the liner and ring, and violently force the ring inwards, in the grooveWhat result will this type of sudden "shock" loading eventually lead to?（）Amicro-seizureBscratchCbreakDstick
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名词解释题Waldeyer淋巴环