单项选择题

下面对于函数的描述中,正确的是（）。

A．函数的定义可以嵌套,但函数的调用不可以嵌套
B．函数的定义不可以嵌套,但函数的调用可以嵌套
C．函数的定义和函数的调用都可以嵌套
D．函数的定义和函数的调用都不可以嵌套

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单项选择题

【金山文档】 Beyond the blue horizon
According to the writer, there are difficulties explaining how the Lapita accomplished their journeys because
A、The canoes that have been discovered offer relatively few clues.
B、Archaeologists have shown limited interest in this area of research.
C、Little information relating to this period can be relied upon for accuracy
D、Technological advances have altered the way such achievements are viewed