甲状腺髓样癌是一种
A．交界性肿瘤
B．错构瘤
C．未分化癌
D．神经内分泌肿瘤
参考答案：D
In the dark forests __________,some large enough to hold several English towns. [ ]
A. stand many lakes
B. lie many lakes
C. many lakes lie
D. many lakes stand
跆拳道比赛中，比赛护具有几种颜色？分别是什么颜色？
