下列正确地在CSS文件中插入注释的语句是( )。A.／／this is a commentB.／／this is a comment／／C.／*this is a comment*／D.this is a comment
下列正确地在CSS文件中插入注释的语句是( )。
A.／／this is a comment
B.／／this is a comment／／
C.／*this is a comment*／
D.this is a comment
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