Avesselisheadingmagneticnorthanditsmagneticcompassindicatesaheadingof003°.Whatactionshouldbetakentoremovethiserrorduringcompassadjustment?()
A. Movethequadrantalspheresclosertothecompass
B. Raisetheheelingmagnetiftheredendisup
C. RemovesomeoftheFlindersbar
D. Raiseorlowertheathwartshipmagnets
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科学家测定了一种鱼类生活环境和血液以及尿液的渗透压,以冰点下降度为单位,结果依次是1.85、0.8和0.7,试问这种鱼类最可能是:()
A. 鲤鱼
B. 鲨鱼
C. 带鱼
D. 草鱼
Avesselisheadingmagneticnorthwestanditsmagneticcompassindicatesaheadingof317°.Whatactionshouldbetakentoremovethiserrorduringcompassadjustment?()
A. Ifthequadrantalspheresareoutasfaraspossiblereplacethemwithsmallerspheres
B. Ifthequadrantalspheresareinasfaraspossibleremoveoneofthespheres
C. Ifthequadrantalspheresareinasfaraspossiblereplacethemwithsmallerspheres
D. Ifthequadrantalspheresareoutasfaraspossible,movethequadrantalspheresin
当吊具()时,磁滞联轴器的感应盘和磁盘的运动方向是一致的。
A. 下降
B. 起升
C. A和B都是
吊钩横梁主要用于()。
A. 装卸大件杂货
B. 装卸超重集装箱
C. 超高架集装箱