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【多选题】
下面关于框架的构成及设置的说法没有错误的是:
A.
一个框架实际上是由一个HTML文档构成
B.
每个框架中，一个蓝色的区块，这个区块是主框架的位置
C.
当在一个页面插入框架时，原来的页面就自动成了主框架的内容
D.
一般主框架用来放置网页内容，而其他小框架用来进行导航
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【简答题】The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory (呼吸的) illnesses and led to calls for laws to control the pollution. Pan Shiyi, a celeb...
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marine life has more medical value than land life
B.
human beings have the right to explore the nature
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they are unknown and mysterious to human being
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the exploration will bring great economic benefits
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【简答题】The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory（呼吸的） illnesses and led to calls for laws to control the pollution. Pan Shiyi, a celebr...
查看完整题目与答案
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