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【单选题】
当测角精度要求较,应变换水平度盘不同位置,观测n个测回 取平均值,变换水平度盘位置的计算公式是()。A.
90°/n
B.
180°/n
C.
270°/n
D.
360°/n
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举一反三
【单选题】Rivers eventually flow into the sea, carrying their pollution with them. ( )
A.
peacefully
B.
smoothly
C.
powerfully
D.
finally
【判断题】The constant decrease of wolves will eventually lead to dust bowls and drained rivers.
A.
正确
B.
错误
【简答题】设计4 个线程，其中两个线程每次对j 增加1，另外两 个线程对j每次减少1。写出程序。
【简答题】设计4个线程，其中两个线程每次对j增加1，另外两个线程对j每次减少1。写出程序。以下程序使用内部类实现线程，对j增减的时候没有考虑顺序问题。
【单选题】The Northern rivers flow more rapidly than the rivers in the South. As a result, ________.( )
A.
the Northern rivers are more useful as sources of water power
B.
the Northern rivers serve better as highways of commerce
C.
the rivers in the South are more useful as sources of water power
D.
the Northern rivers travel a longer way to the sea
【单选题】Who told me about the Rivers family?
A.
Diana Rivers
B.
Mary Rivers
C.
The housekeeper Hannah.
D.
John Rivers.
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