单项选择题

The most of the waste is called         which is relatively harmless and easy to dispose of.
A、general waste    
B、incinerator          
C、ash hazardous
D、--

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问答题

下列在CSS中插入注释正确的写法是()。

答案: A.//thisisacomment//
B.'thisisacomment
C./thisisacom...
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