题目内容

骨骼肌可发生完全强直收缩是因为:()

A. 动作电位时程短于肌肉收缩的收缩期
B. 动作电位时程长于肌肉收缩的收缩期
C. 动作电位时程长于肌肉收缩的舒张期
D. 动作电位时程短于肌肉收缩的舒张期

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主办柜员备岗系统级别为(),只有在替岗时方可上调至05级。

A. “02级有资格”
B. “02级无资格”
C. “05级有资格”
D. “05级无资格”

Youarecrossinganarrowchannelina15-metervesselwhenyousightatankeroffyourportbowcomingupthechannel.WhichstatementisTRUE?()

A. Yoursisthegive-wayvesselbecauseitislessthan30meterslong
B. Youshallnotimpedethesafepassageofthetanker
C. Thetankeristhestand-onvesselbecauseitistoportofyourvessel
D. Thetankeristhestand-onvesselbecauseitisthelargerofthetwovessels

TheSMSshouldprovidefor()ensuringthattheCompanysorganizationcanrespondatanytimetohazards,accidentsandemergencysituationinvolvingitsships.

A. programs
B. progress
C. members
D. measures

在正常生理情况下,神经元细胞膜钠泵每一个活动周期可使:()

A. 2个Na移出膜外,消耗1个ATP
B. 2个K移入膜内,消耗1个ATP
C. 3个Na移出膜外,同时2个K移入膜内,消耗1个ATP
D. 2个Na移出膜外,同时3个K移入膜内,不消耗ATP

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