假设2009年研究机构基础研究经费占比为41%，则2009年高校基础研究经费比研究机

某中心小学有8个班，310名学生，学校内有商店、食堂、校门口有10家小摊小贩，贩卖着各种小食品，星期二有12名学生突发疾病，出现腹痛、腹泻、呕吐、发热、头晕等症状．被紧急送往医院，医生对患者的血液、尿液和粪便进行检查，发现粪便中含有一种致病细菌--痢疾杆菌．后来患病学生人数不断增加，几天后总计有83人患此病．细菌性痢疾属于消化道传染病，是国家乙级传染病，传染性很强，事情发生后疾控中心马上展开调查和处理，假如你是疾控中心卫生防疫工作者，请思考下列问题：

（1）你首先应该研究的问题是______．

（2）痢疾杆菌的来源可能是______．

（3）你准备如何开展研究工作？写出解决问题的基本思路：______．

（4）如何较好地预防此类传染病，谈谈你给同学们的建议：______．

阅读理解。

     On the outside Betsy Lueth's school looks like any other in Minneapolis. Yet inside, it is Yinghua Academy,

a public school where elementary (小学) students study subjects ranging from math to American history in

Chinese.

     Yinghua, the first such immersion (沉浸式) program in the Midwest is on the leading edge of a movement

that in recent years has seen Chinese language programs spread rapidly throughout the U.S.

     The idea behind Yinghua is to introduce kids to the language and culture as early as possible-ideally, before

age 12. Kindergarteners and first graders are taught in Chinese and a single period of English is introduced in

second grade. By sixth grade, kids are learning half in English and half in Chinese, with the expectation of

fluency in both. In Yinghua's classrooms, the walls are covered not with ABCs but with pictures and Chinese

characters.

     There are many challenges at Yinghua. Most teachers come from Taiwan or mainland China, and cultural

misunderstandings are very common. Lueth's teachers are learning to be tolerant of local customs-as well as

a lot more parental input than they are used to. "In China, teachers are respected. They are not questioned,"

says Luyi Lien, Yinghua's Taiwan-born director. "In America, parents are more expressive of their opinions."

     Research has shown that in the long run, immersion programs can provide benefits, including more flexible,

creative thinking. Though students from the programs fall behind for a few years in English, by fifth grade

they perform as well as or better than their monolingual (单语言) peers on standardized reading and math tests.

For multicultural families, the psychological help can also be important. Lueth, a former teacher, co-founded

the school as a way to expose her adopted Chinese daughter Lucy to her native culture. Lucy used to be

annoyed when cousins asked why her skin color was different from theirs; before she started at Yinghua, she

resisted exploring anything related to China Now, Lueth says, Lucy proudly answers her cousins, "Yeah, I was

born in China."

1. Yinghua is different from other schools in Minneapolis in the way that _____.[ ]

A. it offers subjects to students mostly in Chinese

B. its language program is popular in the U.S.A.

C. kids there begin to learn Chinese at the age of 12

D. its students learn subjects half in English and half in Chinese

2. One of the challenges at Yinghua is that _____. [ ]

A. most parents do not respect its teachers

B. teachers need to get used to the local culture

C. its students are mostly from nontraditional families 

D. there is misunderstanding between teachers and students

3. We can learn from the last paragraph that immersion program _____. [ ]

A. enables students pass tests more easily

B. benefits students in learning psychology

C. helps some students accept the local customs

D. contributes to the better development of students

4. Which of the following is TRUE according to the passage? [ ]

A. Teachers in Yinghua have difficulty in understanding the local culture.

B. Parents are discouraged to speak out their opinions of the school in Yinghua.

C. The students in Yinghua are expected to speak English and Chinese fluently.

D. Yinghua is the first school in the U.S.A. to introduce Chinese culture to students.

原发性肺结核的特点不包括（）

A.多见于儿童

B.形成原发综合征

C.急性全身性粟粒性结核多见

D.肺门淋巴结易受累

E.原发病灶常见于肺上叶下部或肺下叶上部近脏胸膜处

对序列(48,37,63,96,22,31,50,55,11)进行升序的堆排序，写出构建的初始(大根)堆及前两趟重建堆之后的序列状态。
初始堆：
第1趟：
第2趟：

地暖有什么好处？