(13分)【化学—物质结构与性质】 氮、磷属于同主族元素,广泛存在于生产生活的各

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问题:

(13分)【化学—物质结构与性质】

氮、磷属于同主族元素,广泛存在于生产生活的各种物质中。

(1)N原子价电子轨道表示式                            

(2)PCl5晶体中只有PCl4+和PCl6-微粒,其晶体结构与氯化铯相同。PCl5晶体类型是         ;PCl4+的空间构型是             

(3)PCl6-呈正八面体的结构(如图),该离子中  (填“是”或“否”)存在配位键,原因是    

(4)NCl3分子中,N原子杂化方式是         ;NCl3不稳定,易发生分解:2NCl3(l)=N2(g)+3Cl2(g),分解过程中形成σ键和π键数目之比为         

(5)C、N、O三种元素的第五电离能(I5)由大到小顺序是                           

考点:物质性质的研究
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风温余邪未尽,肺胃阴伤证的治疗,下列何方最适宜()。

A.增液汤

B.青蒿鳖甲汤

C.清燥救肺汤

D.沙参麦冬汤

E.黄连阿胶汤

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阅读理解。

     Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the

time: if corrected too much, he will stop talking. He notices a thousand times a day the difference between the

language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make

his language like other people's. In the same way, children learning to do all the other things: they learn to do

without being taught to walk, run, climb, whistle, ride a bicycle, compare their own performances with those

of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to

find out his mistakes and correct them for himself. We do it all for him. We act as if we thought that he would

never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Let him work out,

with the help of other children if he wants it, what this word says, what the answer is to that problem, whether

this is a good way of saying or doing this or not.

     If it is a matter of right answer, as it may be in mathematics or science, give him the answer book. Let him

correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help

the child when he tells us that he can't find the way to get the right answer. Let the children learn what all

educated persons must some day learn, how to measure their own understanding, and how to know what they

know or do not know.

1. According to the passage, the best way for children to learn things is by _____.

A. listening to skilled people's advice

B. asking older people many questions

C. making mistakes and having them corrected

D. doing what other people do

2. Which of the following does the writer think teachers should NOT do?

A. Give children correct answers.

B. Allow children to make mistakes.

C. Point out children's mistakes to them.

D. Let children mark their own work.

3. According to the writer, teachers in school should _____.

A. allow children to learn from each other

B. point out children's mistakes whenever found

C. correct children's mistakes as soon as possible

D. give children more book knowledge

4. The passage suggests that learning to speak and learning to ride a bicycle are _____.

A. different from learning other skills

B. the same as learning skills

C. more important than other skills

D. not really important skills

题型:选择题

学校健康促进的一级目标人群是()

A.小学生

B.中学生

C.大学生

D.医学院校学生

E.学生

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测井时,井斜角和方位角变化正常,不能出现()。

A.大于90°

B.90°

C.0°

D.负值

题型:选择题

电气设备的预防性试验应严格按照《电气设备预防性试验规程》规定的各类电气设备的试验周期安排试验计划。

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