疟原虫寄生在人体的( )A．脾细胞和红细胞B．肝细胞和脾细胞C．单核-巨噬细胞D．

下列各句中，没有语病的一项是（    ）(3分)

A．《小儿黑结婚》之所以创下了农村畅销流行的新纪录，关键是作品成功塑造了二诸葛和三仙姑两个农民中的落后形象，以及作品中的口语大众化的语言也起到了关键的作用。

B．和张恨水一样，老舍对北京市井文化的阴暗面较为警惕，同时又对传统文化在现代都市中的失落，持一种惋惜、回顾的态度。

C．《红高粱》虽然已经得到国际社会的关注，2002年它又十分醒目地出现在“诺贝尔文学奖”的候选名单上。

D．虽然巴金先生年老多病，体力不支，却仍然笔耕不辍，每天至少写两千字的文章。

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 maths skills. "Having two languages gives you two windows on the world and makes the brain more flexible (灵活的),"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 two 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.

小题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．1anguage can help brain power

D．1anguage learning and maths study小题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小题3: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小题4:The underlined word “bilingual'’ probably means ______.

A．a researcher on language learning

B．a person who is good at learning foreign languages

C．a person who can speak two languages

D．an active language learner

下列哪一种情形不成立累犯？（）

A.甲犯故意伤害罪被判处有期徒刑3年，缓刑3年，缓刑期满后的第3年又犯盗窃罪，被判处有期徒刑10年

B.乙犯强 * * 罪被判处有期徒刑5年，刑满释放后的第4年，又犯妨害公务罪，被判处有期徒刑6个月

C.丙犯抢夺罪被判处有期徒刑4年，执行3年后被假释，于假释期满后的第5年又犯故意杀人罪被判处无期徒刑

D.丁犯叛逃罪被判处管制2年，管制期满后8年又犯参加恐怖组织罪，被判处拘役6个月

分级负责指变电检修工作按照分级负责的原则管理，严格落实各级人员责任制，（）保证各项工作落实到位。

A.突出重点

B.抓住关键

C.严密把控

D.全面覆盖

单渣法冶炼时，转炉一般脱硫效率为（）

A.10%～20%

B.20%～30%

C.30%～40%

D.40%～50%