The oldest part of the bivalve shell is the
A、umbo(壳顶).
B、periostracum(壳皮层).
C、hingeligament(铰接韧带).
D、leftvalve(左壳).
E、rightvalve(右壳).
发布时间:2024-09-06 21:10:43
A、umbo(壳顶).
B、periostracum(壳皮层).
C、hingeligament(铰接韧带).
D、leftvalve(左壳).
E、rightvalve(右壳).