计算如下表达式的值:Sqrt(4)。Calculate the value of the following expression: Sqrt (4).a. 1b. 2c. 3d. 4

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计算如下表达式的值:Sqrt(4)。Calculate the value of the following expression: Sqrt (4).a. 1b. 2c. 3d. 4

A.a

B.b

C.c

D.d

参考答案:

答案:b