Whiletestingacargotank，youroxygenindicatorreads25%oxygeninthetank.Youwouldthen（）.
A. enterthetanksafely
B. suspecttheaccuracyofthereading
C. ventilatethetank
D. testfornitrogen
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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
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
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