单项选择题
What is the result？（）
A.Compilation fails.
B.An exception is thrown at runtime.
C.The variable first is set to null.
D.The variable first is set to elements[0].
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相关考题
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单项选择题
What is the result？（）
A.1
B.2
C.12
D.Compilation fails.
E.No output is produced.
F.An exception is thrown at runtime. -
单项选择题
What is the result？（）
A.2
B.24
C.234
D.246
E.2346
F.Compilation fails. -
单项选择题
What is the result？（）
A.23
B.234
C.235
D.2345
E.2357
F.Compilation fails.
