单项选择题

Given：

What is the result？（）

A.w-f
B.f-p w-f
C.w-f b-f
D.f-p w-f b-f

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单项选择题

A.300-100-100-100-100
B.300-300-100-100-100
C.300-300-300-100-100
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单项选择题

A.No output is produced. 1 2 3
B.No output is produced. 2 3 4
C.No output is produced. 1 2 3 4
D.An exception is thrown at runtime. 1 2 3