通用项目所列内容是指各专业工程均可列出的措施项目，主要有( )。A．环境保护 B．

最常见畸形中央尖的一组牙是（）

A.下颌第三磨牙

B.下颌第二前磨牙

C.上颌中切牙

D.上颌侧切牙

E.上颌尖牙

患者因牙龈红肿、出血就诊。与牙龈同属咀嚼黏膜的有（）

A.舌背黏膜

B.软腭黏膜

C.硬腭黏膜

D.颊黏膜

E.舌腹黏膜

影艺学院片门

What is the speaker’s opinion about Mr. Smith a. Mr. Smith is worse than anyone the speaker has worked with. b. Mr. Smith is about the average among the people the speaker has worked with. c. Mr. Smith is one of the best people the speaker has worked with. d. Mr. Smith is very special among the people the speaker has worked with.

明渠均匀流的条件与特征是什么？