问题 单项选择题

下列关于肝门静脉的描述,哪项是不正确的

A.肝门静脉压力增高时可出现交通支扩张、腹水等

B.未阻断的情况下,肝门静脉压的正常值 13~24cmH2O

C.肝门静脉主干是由肠系膜上静脉和脾静脉汇合而成

D.肝门静脉与腔静脉之间的交通支最主要的是腹膜后交通支

E.肝门静脉无瓣膜

答案

参考答案:D

解析:
[解题思路] 肝门静脉压的正常值为13~24cmH2O,主干由肠系膜上静脉和脾静脉汇合而成。肝门静脉系与腔静脉系之间存在有4个交通支,最主要的是胃底、食管下段交通支。因肝门静脉无瓣膜,其压力通过流入的血量和流出阻力形成并维持。当肝门静脉血流受阻压力增高时可出现交通支扩张、腹水。
[命题规律] 考察“肝门静脉的解剖及交通”。必须掌握。

单项选择题
单项选择题

I first went to hear a live rock concert when I was eight years old. My brother and his friends were all fans of a heavy metal group called Black Wednesday. When they discovered that Black Wednesday were going to perform at our local theatre, they all bought (21) for the performance. However, at the last minute, once of the friends couldn’t go, so my brother offered me the ticket. I was really excited!

I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our seats. After a few minutes, the lights went down and everybody became quiet. I could barely make out the stage in the (22) . We waited. Then there was a roar from the crowd, like an explosion, as the first members of the band stepped onto the stage. My brother leaned over and shouted something in my ear, but I couldn’t hear what he was saying. The first song was already starting and the music was as (23) as a jet engine. I could (24) the drum beats and bass notes in my stomach.

I can’t recall any of the songs that the band played. I just (25) that I really enjoyed the show and didn’t want it to (26) . But in the end, after three encores (加演), the show finished. We left the (27) and walked unsteadily out onto the pavement. I felt a little dizzy, as if I had just woken from a long sleep. My ears were still (28) with the beat of the last song.

After the (29) , I became a Black Wednesday fan too for a few years before getting into other kinds of music. Once in a while, though, I listen to one of their songs and (30) I’m back at that first show.

27()

A.party 

B.theatre 

C.opera 

D.stage