单项选择题
Given: What is the result?()
A.A B.B C.C D.D E.E
A.A B.B C.C D.D E.E F.F
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.