上颌窦的后外侧壁毗邻（）
A.翼腭窝、颞下窝
B.尖牙窝
C.眼眶底部
D.牙槽突
E.上颌骨鼻突
参考答案：A
文件的逻辑结构可分为两类：流式文件和______。
Which of the following statements about the constant growth dividend discount model (DDM) in its application to investment analysis is FALSE The model:（）
A. is best applied to young, rapidly growing firms.
B. can't be applied when g > K.
C. can't handle firms with variable dividend growth.
