下列哪一项不是犀角地黄汤的功用（）。 A.清热 B.透热 C.凉血 D.散瘀 E.解

文氏电桥振荡器的振荡频率为f=1/RC。

补全对话。逻辑排序排列。

1. Well, I don't like thrillers. They're scary. And action movies are boring. What kind of movies do you

      like? 

2.  What kind of movies do you like? 

3.  Don't you like thriller and action movies? 

4.  Well, I like comedies, because I like funny movies. 

5.  That sounds fun! Let's go! 

6.  Thrillers, comedies and action movies. Do you want to go to a movie?

    正确的顺序: _____

有关永存动脉干的病理，错误的是

A.动脉干不分隔 

B.动脉干骑跨于室间隔上 

C.缺乏独立的肺动脉干 

D.只有一个大的动脉干 

E.此动脉干的解剖形态与肺动脉主干相同

信息系统如何分类？