下列选项中，在配置视口属性时用于设置最小缩放比例的选项为（）
A. inital-scale
B. device-width
C. user-scalable
D. minmum-scale
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下列选项中，关于栅格系统的说法，错误的是（）
A. 栅格系统是一响应式设计的实现方式
B. 栅格系统是一个用于响应式设计的组件
C. 对于前端开发来说，栅格系统的使用能让网页更加灵活和规范
D. 对于网页设计来说，栅格系统的使用可以让网页的信息呈现更加美观、易读
下列选项中，属于弹性盒布局的复合属性是（）
A. order
B. display
C. flex
D. align
在网页开发过程中，让低版本浏览器支持媒体查询需要引入的JS文件是（ ）
A. respond.js
B. underscore-min.js
C. html5shiv.min.js
D. jquery.min.js
下列选项中，属于viewport元标签的是（）
A.
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