题目内容

WhichstepisNOTgenerallytakenwhengas-freeingatank?（）.

A. Washingthetankinteriorwithseawater
B. Applicationofdegreasingsolvents
C. Removalofcorrosionproductsandsludge
D. Freshairventilation

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WhichsubstanceisNOTconsideredtobeOilunderthepollutionpreventionregulations?（）

A. Petroleumandfueloil
B. Sludge
C. Oilmixedwithdredgespoil
D. Oilrefuseandoilmixedwithwastes

Theresultsoftheauditsandreviews（）totheattentionofallpersonnelhavingresponsibilityintheareainvolved.

A. shouldbring
B. shouldbebrought
C. shouldtake
D. shouldbetaken

Whiletestingacargotank，youroxygenindicatorreads25%oxygeninthetank.Youwouldthen（）.

A. enterthetanksafely
B. suspecttheaccuracyofthereading
C. ventilatethetank
D. testfornitrogen

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