多选题NumberFormat nf= NumberFormat.getInstance（）； nf.setMaximumFractionDigits（4）； nf.setMinimumFractionDigits（2）； String a = nf.format（3.1415926）； String b = nf.format（2）； Which two are true about the result if the default locale is Locale.US？（）AThe value of b is 2.BThe value of a is 3.14.CThe value of b is 2.00.DThe value of a is 3.141.EThe value of a is 3.1415.FThe value of a is 3.1416.GThe value of b is 2.0000.
多选题
NumberFormat nf= NumberFormat.getInstance（）； nf.setMaximumFractionDigits（4）； nf.setMinimumFractionDigits（2）； String a = nf.format（3.1415926）； String b = nf.format（2）； Which two are true about the result if the default locale is Locale.US？（）
A
The value of b is 2.
B
The value of a is 3.14.
C
The value of b is 2.00.
D
The value of a is 3.141.
E
The value of a is 3.1415.
F
The value of a is 3.1416.
G
The value of b is 2.0000.
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