一岁婴儿口腔中优势菌为（） A.链球菌 B.葡萄球菌 C.奈瑟菌 D.放线菌 E.乳

经上海证券交易所同意后，发行人和主承销商应于（），日刊登《股份变动及增发股票上市公告书》。

A．1-2

B．1-1

C．1+1

D．1+2

阅读理解。

     She is widely seen as proof that good looks can lastforever. But,at nearly 500 years of age,

time is catching up with the Mona Lisa.

     The health of the famous picture, painted by Leonardo da Vinci in 1505,is getting worse

by the year, according to the Louvre Museum where it is housed.

     "The thin, wooden panel on which the Mona Lisa is painted in oil has changed shape since

experts checked it two years ago," the museum said. Visitors have noticedchanges but

repairing the world's most famous painting is not easy. Experts are not sure about the materials

the Italian artist used and their current chemical state.

     Nearly 6 million people go to see the Mona Lisa every

year, many attracted by the mystery of her smile. "It is very interestingthat when you're not

looking at her, she seems, to be smiling, andthen you look at herand she stops, "said Professor

Margaret Livingstone of Harvard University . "It's because direct vision is excellent at picking

updetail,but less suitedto looking at shadows. Da Vinci paintedthe smile in shadows. "

     However,the actual history of the Mona Lisa is just as my stcrious as the smile. DaVinci

himself loved it so much that he always carriedit with him, until it was even-tually soldto France's

King Francis Ⅰ in 1519.

In 1911,the painting was stolen from the Louvre by a former employee, who took it out of the

museum hidden under his coat. He said he plannedto return it to Italy. The painting was sent

back toFrance two years later. During World War Ⅱ,French hidthe painting in small towns to

keep it out of the hands ofGerman forces.

1. We can infer from the text that_______.

A. the Mona Lisais proved to be able to last another 500 years

B. Mona Lisa's beauty is fading gradually with 500 years passing by

C. the Mona Lisa has been catching people's wide attention in the past 500 years

D. Mona Lisa does not look out of date though painted 500 years ago

2. Which of the following is TRUE. about the Mona Lisa?_____

A. It was once taken away and hidden up by German forces.

B. Its painter himself lovedit greatly and always kept itin ashade.

C. Mona Lisa stops smiling when you look at her wantingto see her smiles.

D. King FrancisIbought it and then returned it to Italy.

3. Choose the right orderabout the happenings onto the MonaLisa._____

a. It was stolen from theLouvre.

b. Its painter sold it to King FrancisⅠ .

c. Its stateof health was checked.

d. It was returned to France and housed in the Louvre Museum.

c. It was hidden andprotected against Germans.

A. b,a,d,c,e

B. d,e,c,b,a

C. d,a,c,c,b

D. b,c,a,d,e

3.It may add to the difficulty in repairing the painting that_______.

A. experts haven't noticed changes in its shape as visitors do

B. it is likely tobe stolen again when it's under repair

C. it is uncertain which country, Italy or France, should take charge

D. expertsaren't sure about the materials or the chemical state of its oil paints

下列哪项属于牙体缺损修复的治疗原则（）

A.正确的恢复形态与功能

B.患牙预备时尽可能保存保护牙体组织

C.修复体应保证组织健康

D.修复应合乎抗力形和固位形的要求

E.以上均是

在计算机指令中，规定其所执行操作功能的部分称为( )。

A．地址码

B．源操作数

C．操作数

D．操作码

史学原以记述近现代事实为主要任务，任何时代的近现代史都是史学家的研究中心．史学容易触犯政治禁忌，成为文字狱和其他变相文字狱的主要对象．清代的文字狱几乎等于历史狱．朴学反是，以经学为中心，以小学(文字学)的训诂、音韵等为附庸，在其范围内的诸子、古史考证、地理、方志等等，都和政治现实没有直接关系．清代顺、康、雍、乾文网太密，文字狱大兴之后，史学因为首当其冲而大衰，考证学因为可以避祸而极盛，便是明证．由于中国封建社会历经的时期特别长，君主权威无限大，一切都被严密控制，学术界便越来越明显地出现这种极其反常的怪现象：现代史成为空白点，近代史成为薄弱点，古代史成为集中点，越古越厚，越今越薄，甚至有古无今，许多学者都成为“信而好古”者．这自然是由于统治者极端专制和极端愚民造成的，而学术界死气沉沉，学术家畏难避祸，以古代史为防空洞、避风港，也是无法辩解和否认的原因．明末清初许多伟大的史学家，在国变之后，毅然决然地都要集中余生精力，就亲身见闻去私编《明史》．《明史》就是他们的近代史．当时，从学术界老前辈黄宗羲、顾炎武、王夫之到万斯同、全祖望等大史学家，多专心致志私著《明史》，把私著《明史》看作高于一切的神圣任务．黄、万、全等清初史学家在中国史学史上的地位是难以比拟的，因为在二十四史中，只有《史记》敢于写到“今上”即当代史．在明代以前，如后汉初修的《前汉书》，唐初的官修《隋书》，元初的官修《宋史》等，均属隔代修史，而且由于官修，那是根本谈不上史德问题的．在清代以后，如民国初年以清朝遗老为主官修的《清史稿》，等于清王朝的奴才为清王朝的主子服务，也是可鄙的．只有明清间的一大群史学家敢于不惜牺牲、无所畏惧地私著信史实录，确为难能可贵，这是中国史学史上最值得大书特书的一点．由此可见史学是以同现实有密切关系的近现代历史为中心的，历史科学工作者必须是大智大勇者，缺乏勇敢精神，就不可能成为伟大的历史学家．

下列说法，不是导致学术界产生“怪现象"的原因的一项是_____．

A．中国封建统治者为维护其专制权力，采用了极端的愚民政策，严密控制学术研究

B．史学的研究中心与政治现实有直接联系，容易触犯政治禁忌

C．文学家畏难避祸，缺乏直言事实的勇敢精神，于是转向考证学和古代史研究

D．中国史学多属于隔代修史和官修，无法做到信史实录