胃泌素瘤的分泌细胞是
A．胰腺的B细胞B．胰腺的非B细胞C．胃的G细胞D．胃的壁细胞E．其他细胞
参考答案：B
They didn’t know how the change had .
A．been taken place
B．happen
C．come about
D．broke out
直接分配法：
