【单选题】Knowing two variables x and y, the following designed algorithm to transform the values of these two variables is correct as () 已知两个变量 x 和 y,下列设计的变换这两个变量的值的算法中正确的是为 ( )
A.
The first step is to assign the value of x to y, and the second step is to assign the value of y to x 第一步,把 x 的值赋给 y,第二步,把 y 的值赋给 x
B.
In the first step, the value of x is assigned to t, in the second step, the value of t is assigned to y, and in the third step, the value of y is assigned to x 第一步,把 x 的值赋给 t,第二步,把 t 的值赋给 y,第三步,把 y 的值赋给 x
C.
In the first step, the value of x is assigned to t, in the second step, the value of y is assigned to x, and in the third step, the value of t is assigned to y 第一步,把 x 的值赋给 t,第二步,把 y 的值赋给 x,第三步,把 t 的值赋给 y
D.
In the first step, the value of y is assigned to x, in the second step, the value of x is assigned to t, and in the third step, the value of t is assigned to y 第一步,把 y 的值赋给 x,第二步,把 x 的值赋给 t,第三步,把 t 的值赋给 y