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【简答题】
分析旅游业对区域发展有哪些影响？
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皮皮学刷刷变学霸
举一反三
【判断题】The symbol "GB/T 14689-2008" denotes that the concern national standard is compulsory.
A.
正确
B.
错误
【判断题】The symbol "GB/T 14689-2008" denotes that the concern national standard is compulsory.
A.
正确
B.
错误
【判断题】The public interest is the standard that guide theadministrator in executing the law. This is the verbal symbol designed tointroduce unity,order,and objectivity into administration.
A.
正确
B.
错误
【判断题】The symbol "GB/T 14689-2008" denotes that the concern national standard is compulsory.
A.
正确
B.
错误
【简答题】The standard symbol for an ohm is ________.
【简答题】电阻R 1 =10Ω，R 2 =20Ω，R 1 和R 2 串联的总电阻为______Ω，并联的总电阻为______。
【单选题】Select the figure that has correct surface roughness symbol according to the latest National Standard. (Single option: 10 points)
A.
(1)
B.
(2)
C.
(3)
D.
None
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