When instructing a crew member concerning the right way to lift a weight，you would instruct him to ______．A.Arch the back to add strength to the musclesB.Bend his knees and lift with his legsC.Bend his back and stoopD.Bend his back and stoop with arms straight
When instructing a crew member concerning the right way to lift a weight，you would instruct him to ______．
A.Arch the back to add strength to the muscles
B.Bend his knees and lift with his legs
C.Bend his back and stoop
D.Bend his back and stoop with arms straight
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The word horsepower(马力) was first used two hundred years ago.James Watt had made the first widely used steam(蒸气)engine. He had no way of telling people exactly how powerful it much work one strong horse could do in one minute. He called that unit one horsepower. With this unit he could measure the work his steam engine could do.He discovered that a horse could lift a 3,300-pound weight 10 feet into the air in one minute. His engine could lift a 3,300-pound weight 100 feet in one minute.Because his engine did ten times as much work as the horse, Watt called it a ten horsepower engine.6.The passagesays that Watt made the first widely used steam engine.A.TB.F7.Watt made up a unit of measurement based on the strength of a horse.A.TB.F8.Watt wanted to find a way to lift a 3300-pound weight.A.TB.F9.One horsepower would equal the weight a horse could lift.A.TB.F10.The title of the passageis "How the Term Horsepower Came into Being".A.TB.F
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单选题When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.AArch the back to add strength to the musclesBBend his knees and lift with his legsCBend his back and stoopDBend his back and stoop with arms straight
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单选题A crew member is unconscious and the face is flushed. You should（）.Alay the crew member down with the head and shoulders slightly raisedBadminister a liquid stimulantClay the crew member down with the head lower than the feetDattempt to stand the crew member upright to restore consciousness
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单选题The best way to determine if a load is within maximum lift limits is to use（）.Aa boom angle indicatorBa load weight indicatorCmaterial invoices for shipping weightsDprior experience with similar lifts