A、<p><span style=\""font-family: 微软雅黑, 'Microsoft YaHei';\"">无穷大量<\/span><br><\/p>
B、<p><span style=\""font-family: 微软雅黑, 'Microsoft YaHei';\"">无穷小量<\/span><br><\/p>
C、<p><span style=\""font-family: 微软雅黑, 'Microsoft YaHei';\"">无界变量<\/span><br><\/p>
D、<p><span style=\""font-family: 微软雅黑, 'Microsoft YaHei';\"">有界变量<\/span><br><\/p>