在系统缺省情况下,下列哪个组的成员可以创建本地用户账号()。
A. Guests
BackupOperators
C. PowerUsers
D. Users
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小儿外感高热、头痛、鼻塞、流涕最宜选用()
A. 保儿宁
B. 小儿热速清
C. 小儿感冒宁
D. 健儿乐
Themostaccuratemethodofdetermininggyrocompasserrorwhileunderwayisby().
A. Comparingthegyroazimuthofacelestialbodywiththecomputedazimuthofthebody
B. Comparingthegyroheadingwiththemagneticcompassheading
C. Determiningfromthechartthecoursemadegoodbetweencelestialfixes
D. Itcannotbedeterminedaccuratelyatseaduetodriftofunknowncurrents
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