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Correct!

题目：

Position the <img> element behind the text.

提示：Use z-index.

修改以下代码：

效果预览：

答案：

效果预览：

CSS 选择器

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 使用

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 背景

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS 文本

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS 字体

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS 链接

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 列表

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS 表格

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 再去学一下教程

CSS 框模型

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 边框

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 轮廓

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS 外边距

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 内边距

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS 高度和宽度

Exercise 1 Exercise 2 再去学一下教程

CSS 可见性

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 定位

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS 对齐

Exercise 1 Exercise 2 再去学一下教程

CSS 组合器

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 伪类

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS 伪元素

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS 透明度

Exercise 1 Exercise 2 再去学一下教程

CSS 属性选择器

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 再去学一下教程

CSS3 圆角

Exercise 1 Exercise 2 再去学一下教程

CSS3 边框图像

Exercise 1 Exercise 2 再去学一下教程

CSS3 多重背景

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS3 颜色

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS3 渐变

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 再去学一下教程

CSS3 阴影效果

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS3 文本效果

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS3 Web字体

Exercise 1 Exercise 2 再去学一下教程

CSS3 2D转换

Exercise 1 Exercise 2 Exercise 3 Exercise 4 再去学一下教程

CSS3 3D转换

Exercise 1 Exercise 2 Exercise 3 再去学一下教程

CSS3 过渡

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 再去学一下教程

CSS3 动画

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 再去学一下教程