搜题请搜索小程序“爱下问搜题”
问题 单项选择题 A1型题

下列关于主动脉瓣区器质性收缩期杂音的特点的描述，错误的是（）

A.粗糙

B.向颈部传导

C.常伴震颤

D.常有A2亢进

E.主要见于主动脉瓣狭窄

答案

参考答案：D

写句子

扩写句子。  

1．桃花心木是树。  

                                                                                                      

2．小女孩在街上走。

                                                                                                        

3．爸爸观看足球比赛。

                                                                                                         

4．他是个老头儿。

                                                                                                        

5．我思念老师。

                                                                                                        

6．她是科学家。

                                                                                                        

7．鲜花开放。

                                                                                                        

8．小羊吃草。

                                                                                                     

查看答案
问答题

两平面镜相互垂直，一束光线斜射到平面镜上，请完成光路图．
查看答案