电影院的银幕对光产生______反射,每条反射光线都______光的反射定律;有

题型:填空题

问题:

电影院的银幕对光产生______反射,每条反射光线都______光的反射定律;有时,我们发现“黑板反光”,这是因为黑板发生______反射的缘故.

考点:漫反射,镜面反射
题型:填空题

阅读下列材料,回答问题。  

  国际奥委会 * * 罗格先生在北京奥运会闭幕 式上说道:“北京奥运会让世界了解中咽,让中国了解了世界。”这说明 中国需要世界,世界也需要中国。我国古代时期,中外文化交流的广泛开展,不仅使'申华文明更加辉煌,而且促进了世界文明的发展。     

请回答:

(1)列举唐代中外文化交流的主要史实。

_____________________________________________________ 

(2)简要分析唐代中外交流频繁的原因。

_____________________________________________________ 

(3)唐代中外文化交流的史实,对今天构建和谐世.界有何借鉴?

_____________________________________________________ 

题型:填空题

信用风险具有明显的系统性风险特征,是不可规避的。()

题型:填空题

训练时,倒立不稳,枕部触于垫上,出现双上肢麻木,活动无力,头稍歪向一侧,不敢转动。可能为何种损伤

A.枢椎齿突基底部骨折

B.寰椎单侧半脱位

C.寰椎后弓骨折

D.寰椎前脱位

E.寰椎后脱位

题型:填空题

阅读理解。

    A group of eight public high school students  in Massachusetts, aged l5 to l7, designed and ran their

own school within a school. They named their practice the Independent Project. They represented the

usual range: two were close to dropping out before they started the project, while others were honors

students.

     Their guidance teacher was their adviser, consulting with them when the group encountered difficulties. Though they sought advice from English, math and science teachers, they were responsible for monitoring one another's work and giving one another feedback. There were no grades, but at the end of the term,

the students wrote evaluations of their classmates.

     The students also designed their own course. In addition to some  regular courses, they each took on

an 'individual project', learning to play the piano or to cook, writing a novel or making a video about

domestic (国内的) violence. At the end of the term,they performed their new skills in front of the entire

school. The last part of their self - designed course was to do a 'collective project' that had social

significance. Because they felt the whole experience had been so life - changing, they ended

up making a film showing how other students could start and run their own schools.

     The project was a success. After returning to their traditional study, the students have high motivation

and are doing well. One student who had failed all of his previous math courses spent three weeks

teaching the others about probability. The lesson learned here is that if students are given the opportunity

to take control or contribute significantly to their own learning they will become more accomplished,

more engaged and more knowledgeable.

     The students in the project are remarkable because they demonstrate the kinds of learning and  

personal growth that are possible when teenagers feel ownership of their high school experience, learn

things that matter to them and learn together.

l. Which of the following statements is TRUE?

A. Some students might drop out of high school.

B. The teachers monitored the students' homework.

C. The students themselves solved all their problems.

D. The teachers evaluate the students' performances.

2. The students involved in the Independent Project               .

A. didn't need to learn common lessons

B. tended to escape from the whole society

C. were unwilling to share their experiences

D. focused on self-study and working together

3. According Paragraph 4, we know that               .

A. the traditional study is better than the project

B. all the students had failed their math courses

C. the students have freedom to design their lessons

D. the project was mainly concerned with math courses

4. The project made the students outstanding because               .

A. they are unusually talented

B. they have better backgrounds

C. they have supportive teachers

D. they are owners of their education

5. What would be the best title of the text?

A. Structure the kids' days to the minute

B. Let kids rule their own school within a school

C. Offer students few opportunities to do anything

D. Provide traditional education to the students

题型:填空题

下列哪些是引起便血的结肠疾病.()

A.Crohn病

B.急性细菌性痢疾

C.急性出血性坏死性肠炎

D.肠结核

E.十二指肠球部溃疡

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