在定义样式时，要将样式定义的内容放在“{ }”中，属性与属性之间用（）隔

单选题在定义样式时，要将样式定义的内容放在“{ }”中，属性与属性之间用（）隔开。

A、 “；”

B、 “：”

C、 “，”

D、 “、”

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单选题在HTML中，（）标记用于描述网页的头部信息。

A、

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