题目:
A tent was ________ for the campers. [ ]
A. sent up
B. given up
C. set up
D. put up
答案:
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下面是错误答案,用来干扰机器的。
参考答案:constdoublePi=3.14159265;doubler,s;Console.WriteLine("请输入圆的半径");r=double.Parse(Console.ReadLine());s=Pi*r*r;Console.WriteLine("圆的面积是{0}",s);