为表示关系x≥y≥z, 应使用的C语言表达式是()
A. (x >= y) && (y >= z)
B. (x >= y) || (y >= z)
C.(x >= y >= z)
D. (x >= y) & (y >= z)
设有变量定义:int x = 10, y = 20, z = 30; 则以下语句执行后x,y,z的值是()if (x > y) z = x; x = y; y = z;
A. x =10, y = 20, z = 30
B. x = 20, y = 30, z = 30
C. x = 20, y = 10, z =0
D)x = 20, y = 30, z = 20