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【单选题】
先将总体各元素按某种顺序排列,并按某种规则确定一个随机起点,然后,每隔一定的间隔抽取一个元素,直至抽取n个元素形成一个样本。这样的抽样方式称为A.
简单随机抽样
B.
分层抽样
C.
系统抽样
D.
整群抽样
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A.
不能在同程序中定义
B.
可以在同一程序中定义并可重载
C.
可以在同程序中定义,但不可以重载
D.
以上说法均不正确
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A.
不能在同一程序块中定义
B.
可以在同一个程序块中定义并可重载
C.
可以在同一个程序块中定义，但不可以重载
D.
以上说法均不正确
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A.
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B.
错误
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A.
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A.
定位误差10～20nmile
B.
定位误差20～40nmile
C.
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D.
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则它们_____A. 不能再同一程序中定义 B. 可以在同一程序中定义并可重载 C. 可以在同一程序中定义，但不可以重载 D. 以上说法均不正确
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