外科常见的休克类型是（）。 A.低血容量性休克 B.创伤性休克 C.感染性休克 D.

一细杆与水桶相连，水桶中装有水，水桶与细杆一起在竖直平面内做圆周运动，如图所示，水的质量m＝0.5kg，水的重心到转轴的距离l＝50cm。（取g＝10m/s²，不计空气阻力）

⑴若在最高点水不流出来，求桶的最小速率；

⑵若在最高点水桶的速率v＝3m/s，求水对桶底的压力。

纤维壁上有众多细小砂晶和方晶的药材是（）

A.麻黄 

B.薄荷 

C.穿心莲 

D.淫羊藿 

E.广藿香

阿托品不具有下列哪种作用

A．松弛睫状肌
B．松弛瞳孔括约肌
C．调节麻痹、视近物不清
D．降低眼内压
E．瞳孔散大

The way people hold to the belief that a fun­filled，pain­free life equals happiness actually reduces their chances of ever attaining real happiness.If fun and pleasure are equal to happiness，then pain must be equal to unhappiness.But in fact，the opposite is true.More often than not，things that lead to happiness involve some pain.

As a result，many people avoid the very attempts that are the source of true happiness.They fear the pain inevitably (不可避免地) brought by such things as marriage，raising children，professional achievement，religious commitment and self­improvement.

Ask a bachelor (单身汉) why he resists marriage even though he finds dating to be less and less satisfying.If he is honest，he will tell you that he is afraid of making a commitment.Certainly，commitment is quite painful.The single life is filled with fun，adventure，and excitement.Marriage has such moments，but they are not its most distinguishing (显著的) features.

Couples with infant (婴儿) children are lucky to get a whole night’s sleep or a three­day vacation.I don’t know any parent who would choose the word fun to describe raising children.But couples who decide not to have children never know the joys of watching a child grow up or of playing with a grandchild.

Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating realizations.It liberates time：now we can devote more hours to activities that can genuinely increase our happiness.It liberates money：buying that new car or those fancy clothes that will do nothing to increase our happiness now seems pointless.And it liberates us from envy：we now understand that all those who are always having so much fun actually may not be happy at all.

小题1:According to the author，a bachelor doesn’t want to marry mainly because________.

A．he is unwilling to take family responsibilities

B．he believes that life will be more cheerful if he remains single

C．he finds more fun in dating than in marriage

D．he fears it will put an end to all his fun adventure and excitement小题2:Raising children，in the author’s opinion，is________.

A．a moral duty

B．a thankless job

C．a rewarding task

D．a source of inevitable pain小题3:To understand what true happiness is one must________.

A．have as much fun as possible during one’s lifetime

B．make every effort to liberate oneself from pain

C．put up with pain under all circumstances

D．be able to distinguish happiness from fun小题4:What is the main idea of the passage?

A．Happiness often goes hand in hand with pain.

B．One must know how to attain happiness.

C．It is important to make commitments.

D．It is pain that leads to happiness.

NJ07型列车网压显示有两种途径：（）显示和（）表显示，分别由（）采集和（）采集提供。