题目
A.// this is a comment
B./// this is a comment
C./*this is a comment */
D.' this is a comment
第1题
A.// this is a comment
B.// this is a comment //
C./* this is a comment */
D.' this is a comment
第2题
A./* this is a comment */
B.// this is a comment
C.<this is a comment>
D.<!--this is a comment-->
第4题
A.// this is a comment//
B.// this is a comment
C./* this is a comment */
D.’this is a comment
第5题
第8题
第10题
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