患儿，4岁。先天性心脏病并发急性心力衰竭急诊入院，经急诊处理后，情况基本稳定，欲转往

属于卵巢良性肿瘤的是（）

A.内胚窦瘤

B.颗粒细胞瘤

C.卵泡膜细胞瘤

D.库肯勃瘤

E.无性细胞瘤

You might search on the internet for professors and their courses about this university ____ may

interest you. [ ]

A. where            

B. that          

C. which          

D. who

阅读理解。

      If English means endless new words,difficult grammar and sometimes strange pronunciation,

you are wrong.Haven't you noticed that you have become smarter since you started to learn a

language?

     According to a new study by a British university,learning a second language can lead to an

increase in your brain power.Researchers found that learning other languages changes grey

matter.This is the area of the brain which processes information.It is similar to the way that

exercise builds muscles.

     The study also found the effect is greater the younger people learn a second language.A

team led by Dr Andrea Mechelli,from University College London,took a group of Britons

who only spoke English.They were compared with a group of "early bilinguals" who had learnt

a second language before the age of five,as well as a number of later learners.

      Scans showed that grey matter density(密度)in the brain was greater in bilinguals than in

people without a second language.But the longer a person waited before mastering a new

language,the smaller the difference.

     "Our findings suggest that the structure of the brain is changed by the experience of learning

a second language," said the scientists.It means that the change itself increases the ability to learn.

      Professor Dylan Vaughan Jones of the University of Wales has researched the link between

bilingualism and math skill."Having two languages gives you two windows on the world and makes

the brain more flexible," he said."You are actually going beyond language and have a better

understanding of different ideas."

     The findings were matched in a study of native Italian speakers who had learned English as a

second language between the ages of 2 and 34.Reading,writing,and comprehension were all tested.

The results showed that the younger they started to learn,the better."Studying a language means you

get an entrance to another world," explained the scientists.

1.The main subject talked about in this passage is __________.

A.science on learning a second language

B.man's ability of learning a second language

C.language can help brain power

D.language learning and math study

2.In the second paragraph,the writer mentions "exercise" in order to _________.?

A.say language is also a kind of physical labor

B.prove that one needs more practice when he/she is learning a language

C.to show the importance of using the language when you learn the language

D.make people believe language learning helps grey matter work well

3.The underlined word "bilingual" probably means __________.

A.a researcher on language learning

B.a second language learner

C.a person who can speak two languages

D.an active language learner

4.We may know from the scientific findings that ___________.

A.the earlier you start to learn a second language the higher the grey matter density is

B.there is no difference between a later second language learner and one who doesn't know a second

language

C.the experience of learning a second language has bad effect on people's brain

D.the ability of learning a second language is changing all the time

5.In the last two paragraphs,the author wants to tell us that _________.

A.learning a second language is the same as studying math

B.early learning of a second language helps you a great deal in study other subjects

C.Italian is the best choice for you as a second language

D.you'd better choose the ages between 2 and 34 to learn a second language

把天然气从井底采出到地面的全部工艺过程称为（）。

男性，25岁。因腰背部疼痛1个月余，加重3天入院。1个月前劳累后出现腰痛，当地医院诊断为"腰肌劳损"，予理疗，症状稍缓解。发病后食欲较差，体重减轻1．5kg。时有午后低热，夜间出汗较多。查体：腰_4、5椎活动度受限，腰棘突压痛，双下肢感觉运动正常。右下腹饱满，肌稍紧张，轻压痛。

根据以上病史和体征，初步诊断首先考虑（）

A.腹部肿瘤

B.慢性阑尾炎

C.腰椎结核

D.腰椎间盘突出症

E.腰肌劳损