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Given：   12. NumberFormat nf = NumberFormat.getInstance（）；   13. nf.setMaximumFractionDigits（4）；   14. nf.setMinimumFractionDigits（2）；   15. String a = nf.format（3.1415926）；   16. String b = nf.format（2）；   Which two statements are true about the result if the default locale is Locale.US？（）
A: The value of b is 2.00.
B: The value of a is 3.141.
C: The value of a is 3.14.
D: The value of b is 2.0000.
E: The value of a is 3.1415.
F: The value of a is 3.1416.
G: The value of b is 2.

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出自：Oracle认证

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