恶性滋养细胞肿瘤的瘤细胞进入脑血管后，分为三个阶段，即______、脑瘤期、脑疝期。
参考答案：瘤栓期
The problem just _____ to be discussed at the next meeting. [ ]
A. referred is
B. referred to be
C. referring to is
D. referred to is
沿磨牙后垫转向内下方而入舌侧后部的凹陷区为舌侧
A．主承托区 B．副承托区 C．边缘封闭区 D．缓冲区 E．翼缘区
