A、<span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">“</span><span style="font-size: 16px; line-height: 18.88888931274414px;">A</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">”与</span><span style="font-size: 16px; line-height: 18.88888931274414px;">’A’</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">是相同的</span>
B、<span style="font-family: 宋体; line-height: 18.88888931274414px;">字符串是常量,字符是变量</span>
C、<span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">“</span><span style="font-size: 16px; line-height: 18.88888931274414px;">A</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">”与</span><span style="font-size: 16px; line-height: 18.88888931274414px;">’A’</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">是不同的</span>
D、<span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">“</span><span style="font-size: 16px; line-height: 18.88888931274414px;">A </span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">”</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">与</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">“</span><span style="font-size: 16px; line-height: 18.88888931274414px;">A</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">”</span><span style="font-size: 16px; line-height: 18.88888931274414px; font-family: 宋体;">是相同的</span>
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