A、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 16px">投入期</span>
B、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 16px">成长期 </span>
C、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 16px">成熟期</span>
D、<span style="FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 16px">衰退期</span>