按照矿物的浮选顺序，选矿厂使用的浮选流程属哪种方案？

8岁男孩，自幼反复发作膝、肘等大关节炎，现左肘、左踝及右踝关节均有肿胀，活动受限。父母体健，一表兄有相同疾患。血象基本正常。

该患者的病史采集中应注意（）

A.肝病史

B.药物史

C.过敏史

D.传染病史

E.家族史

大量出汗时尿量减少，主要是由于

A．血浆晶体渗透压升高，引起抗利尿激素分，泌
B．血浆晶体渗透压降低，引起抗利尿激素分泌
C．交感神经兴奋，引起抗利尿激素分泌
D．血容量减少，导致肾小球滤过减少
E．血浆胶体渗透压升高，导致肾小球滤过减少

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

金属基底表面处理不当，瓷烧结时最易出现的问题是

A．变色
B．裂瓷
C．崩瓷
D．变形
E．变脆

火灾探测器工程验收的要求（）

A.火灾探测器（包括手动报警按扭）应进行模拟火灾响应试验和故障报警抽验

B.实际安装数量在100只以下者，抽验10只

C.实际安装数量在100只以下者，抽验10％

D.实际安装数量超过100只者，按实际数量5％－10％的比例，但不少于10只抽验

E.被抽验探测器的试验均应正常