用气相色谱法测定混合气体中的H2含量时,要求氢气出峰应选择的载气是()。

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问题:

用气相色谱法测定混合气体中的H2含量时,要求氢气出峰应选择的载气是()。

考点:生化化工药品技能考试色谱气体分析岗位考试色谱气体分析岗位考试题库
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However important we may regard school life to be, there is no denying the fact that children spend more time at home than in the classroom. Therefore, the great influence of parents cannot be ignored or discounted by the teacher. They can become strong allies of the school personnel or they can consciously or unconsciously hinder and frustrate curricular objectives.

Administrators have been aware of the need to keep parents informed of the newer methods used in schools. Many principles have conducted workshops explaining such matters as the reading readiness program, manuscript writing and developmental mathematics. Moreover, the classroom teacher, with the permission of the supervisors, can also play an important role in enlightening parents. The informal tea and the many interviews carried on during the year, as well as new ways of reporting pupils’ progress, can significantly aid in achieving a harmonious interplay between school and home.

To illustrate, suppose that a father has been drilling Junior in arithmetic processes night after night. In a friendly interview, the teacher can help the parent sublimate (升华) his natural paternal interest into productive channels. He might be persuaded to let Junior participate in discussing the family budget, buying the food, using a standard or measuring cup at home, setting the clock, calculating mileage on a trip and engaging in scores of other activities that have a mathematical basis.

If the father follows the advice, it is reasonable to assume that he will soon realize his son is making satisfactory progress in mathematics, and at the same time, enjoying the work. Too often, however, teachers’ conferences with parents are devoted to petty (不重要的) accounts of children’s misdeeds, complaints about laziness and poor work habits, and suggestion for penalties and rewards at home.

What is needed is a more creative approach in which the teacher, as a professional adviser, plants ideas in parents’ minds for the best utilization of the many hours that the child spends out of the classroom.

In this way, the school and the home join forces in fostering the fullest development of youngsters’ capacities.

(Note:Answer the questions or complete the statements with NO MORE THAN 14 WORDS)

小题1:Why do parents also have great influence on children?

_________________________________________________________________________ .

小题2:Through which ways can the teacher play an important role in enlightening parents?

_________________________________________________________________________ .

小题3:According to the teacher, that parents should let the boy ____________________________ if he wants to sublimate his natural paternal interest into productive channels in teaching his son arithmetic.

小题4:A more creative approach is needed for ___________________of children out of classroom.

题型:填空题

基于如下叙述:关系模式Student(Sno,Sname,Cno,Cname,Grade,Tname,Taddr)的属性分别表示学号、学生姓名、课程号、课程名、成绩、任课教师名和教师地址。其中,一个学生可以选修若干门课程,一个教师可以讲授若干门课程,一门课程可以由若干教师讲授,一个学生选修一门课程时必须选定讲授课程的教师,教师不会重名。

关系模式Student的规范化程度最高达到()。

A.1NF

B.2NF

C.3NF

D.BCNF

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女性,30岁。双侧 * * 胀痛3年,并触及不规则 * * 肿块,轻触痛。月经前出现 * * 胀痛,经后自行消退。应考虑为()。

A.乳腺炎

B. * * 纤维腺瘤

C.乳腺癌

D.乳腺囊性增生病

E.乳管内 * * 状瘤

题型:填空题

若薄钢板四周呈波浪变形时,说明钢板中间的纤维比四周()。

A.松

B.紧

C.长

题型:填空题

自然条件下蜂王产生的方式。

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