充填体悬突的危害如下，除外A．牙龈萎缩B．牙髓炎C．牙周炎D．龈 * * 炎E．牙槽骨吸收

已知二次函数：（1）图象不经过第三象限；（2）图象经过点（2，-5），请你写出一个同时满足（1）和（2）的函数关系式：______．

I wanted to explain,           she didn’t give me any chance.

A. and                                 B. but                            C. so

—Do you think Mark Twain's stories are ______?  

—Yeah. Most of us are ______ in his stories.[ ]

A. interesting, interested    

B. interested, interesting

C. interesting, interesting  

D. interested, interesting

患者，22岁。吞咽不畅，胸骨后沉重不适，症状时轻时重，时有呕吐，吐出食管潴留的食物，病史2年，用药症状无缓解，作食管钡剂造影，食管下端呈鸟嘴样狭窄，该病人诊断是

A．食管癌
B．食管良性肿瘤
C．贲门失驰缓症
D．食管炎
E．食管憩室

链转移