属于上皮组织来源的肿瘤是（）
A.间皮瘤
B.癌肉瘤
C.黑色素瘤
D.Bowen病
E.滑膜瘤
参考答案：D
Do we spend money on unnecessary things so ______ is left for important things such as healthcare or education?
A．nothing
B．none
C．no one
D．neither
绿独玉主要因含白云母矿物致色。
