A、<strong><span style="FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; FONT-SIZE: 14px">10~50</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">年</span> </strong>
B、<strong><span style="FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; FONT-SIZE: 14px">30~50</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">年</span> </strong>
C、<strong><span style="FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; FONT-SIZE: 14px">50~100</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">年</span> </strong>
D、<strong><span style="FONT-FAMILY: 'Times New Roman','serif'; COLOR: black; FONT-SIZE: 14px">100</span><span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 14px">年以上</span></strong>
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