A、<p><span style="font-size: 10.5pt; font-family: 宋体;">木栓层中间</span></p>
B、<p><span style="font-size: 10.5pt; font-family: 宋体;">皮部</span></p>
C、<p><span style="font-size: 10.5pt; font-family: 宋体;">木质部内侧</span></p>
D、<p><span style="font-size: 10.5pt; font-family: 宋体;">韧皮部外侧</span></p>
E、<p><span style="font-size: 10.5pt; font-family: 宋体;">髓部</span></p>