![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
A.s=-5:0.1:5; t=-5:0.1:5; [x, y]=meshgrid(s, t); z=sqrt(x.^2+y.^2); mesh(x,y,z)
B.a=3; b=2; s=-5:0.1:5; t=-5:0.1:5; [x, y]=meshgrid(s, t); z=sqrt(x.^2/a/a+y.^2/b/b); mesh(x, y, z)
C.a=3; b=2; s=-5:0.1:5; t=-5:0.1:5; [x, y]=meshgrid(s, t); z=sqrt(x.^2/a*a+y.^2/b*b); mesh(x, y, z)
D.a=3; b=2; s=-5:0.1:5; t=-5:0.1:5; [x, y]=meshgrid(s, t); z=sqrt(x^2/a/a+y^2/b/b); mesh(x, y, z);
E.s=-5:0.1:5; t=-5:0.1:5; [x, y]=meshgrid(s, t); z=sqrt(x.^2/9+y.^2/4); mesh(x, y, z)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_ckda.png)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_q_wyda.png)
- · 有3位网友选择 E,占比16.67%
- · 有3位网友选择 A,占比16.67%
- · 有3位网友选择 C,占比16.67%
- · 有2位网友选择 D,占比11.11%
- · 有2位网友选择 A,占比11.11%
- · 有2位网友选择 D,占比11.11%
- · 有1位网友选择 B,占比5.56%
- · 有1位网友选择 E,占比5.56%
- · 有1位网友选择 B,占比5.56%