下列哪些结构超声不易显示（）。①闭孔内肌②梨状肌③髂腰肌④髂窝三角 A.① B.①②

开放式EDI

阅读理解。

     I live in the land of Disney, Hollywood and year-round sun. You may think people in such a splendid,

fun-filled place are happier than others. If so, you have some mistaken ideas about the nature of happiness.

Many intelligent people still equate happiness with fun. The truth is that fun and happiness have little or

nothing in common. Fun is what we experience during an act. Happiness is what we experience after an

act. It is a deeper, more lasting emotion.

    Going to an amusement park or ball game, watching a movie or television, are fun activities that help us

relax, temporarily forget our problems and maybe even laugh. But they do not bring happiness, because

their positive effects end when the fun ends.

    I have often thought that if Hollywood stars have a role to play, it is to teach us that happiness has

nothing to do with fun. These rich, beautiful individuals have constant access to glamorous parties, fancy

cars, expensive homes, everything that spells"happiness". But in memoir(回忆录)after memoir, they

reveal the unhappiness hidden beneath all their fun: depression, alcoholism ,drug addiction, broken

marriages, troubled children and profound loneliness.

    Ask a bachelor why he resists marriage, if he's honest, and he will tell you that he is afraid of making a

commitment, for commitment is in fact quite painful. The single life is filled with fun, adventure and

excitement. Marriage has such moments, but they are not its most distinguishing features.

    Similarly, couples that choose not to have children are deciding in favor of painless fun over painful

happiness. They can dine out whenever they want and sleep as late as they can. Couples with infant

children are lucky to get a whole night's sleep or a three-day vacation. I don't know any parent who

would choose the word fun to describe raising children.

    Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating(解放性的)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 rich and glamorous people we were so sure are happy because they are always having so much fun

actually may not be happy at all.

1. We can learn from the passage that ________.

A. fun creates long-lasting satisfaction

B. fun provides enjoyment while pain leads to happiness

C. happiness is lasting whereas fun is short-lived

D. fun that is long-standing may lead to happiness

2. To the author, the role Hollywood stars play is to ________.  

A. write memoir after memoir about their happiness

B. tell the public that happiness has nothing to do with fun

C. teach people how to enjoy their lives

D. bring happiness to the public instead of going to parties

3. In the author's opinion, marriage ________ .

A. affords greater fun    

B. leads to raising children

C. indicates duty and devotion    

D. usually ends up in pain

4.Which of the following is the best example of"painful happiness"?

A. Winning lottery by accident    

B. A bachelor resisting marriage

C. Raising children        

D. Buying some fancy clothes

5. If one gets the true sense of happiness, he will ________.

A. stop playing games and joking with others    

B. keep himself with his family

C. give a free hand to money        

D. use his time to increase happiness

下列不属于固体废弃物的是（）。

A、工业固体废弃物

B、农业固体废弃物

C、生活固体废弃物

D、医疗固体废弃物

A公司是甲市一家大型国有企业，是增值税一般纳税人；B公司是A公司在乙市设立子公司，主营业务为锅炉安装，其营业收入向当地地税局缴纳营业税。A公司2002年1月发生如下业务：
(1)将自己生产的利能达牌75吨新型节能环保锅炉两台，以不含税单价200万元的价格，卖给B公司。
(2)向长青发电厂销售利能达牌75吨新型节能环保锅炉一台，不含税单价600万元。
(3)为本单位浴池生产安装4吨锅炉一台。生产成本为10万元，未从本期生产成本转出。
(4)因本公司浴池安装锅炉生产在建工程费用3万元，其中领用原材料不含税价2万元，增值税进项税额340万元未作进项税额转出，其他费用1万元，未从在建工程转出。
月初增值税进项税额余额为零，本月购进原材料发生增值税进项税70万元，2002年2月10日申报并缴纳一月份增值税100万元。
根据上述资料回答下列问题：

A公司应补缴的增值税额为( )。

A．136万元

B．68万元

C．1380777.78元

D．1378888.89元

实验动物按对携带的微生物控制程度分为不同级别，何种级别为不携带主要潜在感染或条件致病及对科学实验干扰大的寄生虫或原虫的动物？（）

A．一级

B．二级

C．三级

D．四级