单项选择题
What is the result？（）
A.a，b，c B.1，2，3 C.a1b2c3 D.a1 b2 c3 E.Compilation fails. F.The code runs with no output. G.An exception is thrown at runtime.
单项选择题 What is the result？（）
多项选择题 Which two statements are true about The result if the default locale is Locale.US？（）
单项选择题 What is the result when method testIfA is invoked？（）
