题目内容

Themostaccuratemethodofdetermininggyrocompasserrorwhileunderwayisby().

A. Comparingthegyroazimuthofacelestialbodywiththecomputedazimuthofthebody
B. Comparingthegyroheadingwiththemagneticcompassheading
C. Determiningfromthechartthecoursemadegoodbetweencelestialfixes
D. Itcannotbedeterminedaccuratelyatseaduetodriftofunknowncurrents

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1mol的理想气体,在27度的恒温下体积发生膨胀,其压强从20p准静态的下降到1p,气体所作的功为()。

A. 0J
B. 8.31J
C. 7.47×10J
D. -7.47×10J

Thequadrantalspheresareusedto().

A. Removedeviationontheintercardinalheadings
B. Removedeviationonthecardinalcompassheadings
C. Removeheelingerror
D. Compensateforinducedmagnetisminverticalsoftiron

经营者的下列做法中,正确的是()

A. 一汽车生产厂家在其销售单上声明:“未成年驾驶本车造成损害,本厂不负任何责任”
B. 一烟草生产商生产的卷烟的焦油含量达到了国家标准,所以在卷烟的包装盒上未标“吸烟有害健康”字样
C. 某牛奶公司在其鲜奶的包装袋上注明:“本品应当在保质期内饮用”
D. 某游泳池的经营者在游泳池的入口处挂牌声明:“没有深水证者禁止入内”

Thisinducedmagnetism()thepermanentmagnetismalreadypresentintheship.

A. willaddto
B. willsubtractfrom
C. mayaddtoorsubtractfrom
D. willnotchange

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