名词解释题环形染色体(ring chromosome)
名词解释题
环形染色体(ring chromosome)
参考解析
解析：
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相关考题：
备锚，摇“备车”钟。（）A、Get anchor ready and ring “Stand by engine”.B、Get anchor ready and ring “Finished with engine”.C、Get mooring ready and ring “Stand by engine”.D、Get mooring ready and ring “Finished with engine”.
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A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（） Ⅰ.gap Ⅱ.sideAⅠonlyBⅡ onlyCboth Ⅰ and ⅡDneither Ⅰ nor Ⅱ
单选题Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）AbackBsideCgapDbottom
单选题In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.Apiston crownBpiston ring grooveCpiston skirtDpiston ring area
单选题A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）AgapBsideCbackDradial
单选题On a ship，how many ring buoys are required to have a buoyant line attached?（）AOne ring life buoyBOne ring life buoy on each side of the shipCThree ring life buoysDTwo ring life buoys on each side of the ship
单选题If the compression rings on a diesel engine piston become stuck in the ring groove, the cause may be due to（）Aexcessive ring actionBexcessive ring temperatureCimproper ring rotationDexcessive ring face wear
单选题染色体核型中缩写符号“r”表示（ ）A倒位B嵌合体C易位D环形染色体E次缢痕