该病例最有可能诊断() A．左房黏液瘤 B．主动脉瓣关闭不全 C．二尖瓣狭窄 D．二

根据对话情景和内容，从对话后所给的选项中选出能填入每一空白处的最佳选项。选项中有两个多余选项。

– He is very good, isn’t he?

– __1__   

– I said the singer was great.

– _2__   

– Have you seen him before?

– __3__I think he probably writes the music and words because I’ve never heard any of the songs before.

– It’s not fair.

– _4_                                                     

– People with musical ability like that having to stand around here to make a living.

– Perhaps he enjoys it or makes more money than you think.

– __5__

A．What do you mean?

B．Sorry, what did you say?

C．I hope so.

D．Do you like popular music?E. Be quiet, listen to him.

F. Yes and interesting to watch.

G. Oh, yes. He’s always at exactly the same place on Saturdays when I come into town. 

我国劳动就业的形式主要有？

快速成型技术主要有哪几种？简述其基本原理。

国有企业中（）是企业实行民主管理的基本形式，是职工行使民主管理权力的机构。 

A、职工代表大会   

B、民主集中制

立式容器支座主要有（）三种

A、自撑式

B、悬挂式

C、支承式

D、裙式