下面关系式，（ ）中的x和y成反比例．
A: x3=y
B: 3x=y
C: 3x=y
D: xy=3
A: x3=y
B: 3x=y
C: 3x=y
D: xy=3
举一反三
- 下列语句正确的是( ) A: If x<3*y And x>y Then y=3x B: If x<3*y And x>y Then y=x^3 C: If x<3*y : x>y Then y=x^3 D: If x<3*y And x>y Then y=x**3
- 如下C程序的输出是什么？#include [stdio.h]void Func1 (int x, int y);void Func2 (int *x, int *y); int main() { int x = 3; int y = 4;Func1 (x, y); printf ("x = %d, y = %d\n", x, y);Func2(&x, &y); printf ("x = %d, y = %d\n", x, y);} void Func1 (int x, int y) { x = x + y; y = x - y; x = x - y; printf ("x = %d, y = %d\n", x, y);} void Func2 (int *x, int *y) { *x = *x + *y; *y = *x - *y; *x = *x - *y;;} A: x = 3, y = 4x = 3, y = 4x = 3, y = 4 B: x = 4, y = 3x = 4, y = 3x = 4, y = 3 C: x = 3, y = 4x = 3, y = 4x = 4, y = 3 D: x = 4, y = 3x = 3, y = 4x = 4, y = 3
- 下列语句正确的是________。 A: If X ＜ 3 * Y And X ＞ Y Then Y = X ^ 3 B: If X ＜ 3 * Y And X ＞ Y Then Y = X3 C: If X ＜ 3 * Y : X ＞ Y Then Y = X ^ 3 D: If X ＜ 3 * Y And X ＞ Y Then Y = X * * 3
- xy=1，x与y成______比例；x=y5，x与y成______比例；x3=4y，x与y成______比例；3x=y，x与y成______比例．
- 下列语句正确的是( ) A: If x<3*y And x>y Then y=3x B: If x<3*y And x>y Then y=x^3 C: If x<3*y : x>y Then y=x^3 D: If x<3*y And x>y Then y=x**3