试题与答案

中性点不接地系统单相接地时,规程规定允许运行两小时,尽快找出事故点,否则切断电源,这

题型:单项选择题

题目:

中性点不接地系统单相接地时,规程规定允许运行两小时,尽快找出事故点,否则切断电源,这个规定是考虑供电()要求。

A.安全性

B.可靠性

C.经济性

D.灵活性

答案:

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题型:问答题

下列A ~ F是初中化学中的六个实验,请按要求填空:

(1)C实验中搅拌的目的是                

(2)B实验中红磷燃烧的化学方程式为                                         ,实验说明氧气的体积约占空气的         ,实验成功的关键是              (填序号).

①装置气密性好;②实验前夹紧止水夹;③红磷过量或足量;

④冷却后再打开止水夹;⑤要选用教室内的空气.

(3)E实验 先滴氢氧化钠溶液,此时观察到的现象是                        ;发生反应的化学方程式为                                           再滴盐酸时观察到的现象是                        ;发生反应的化学方程式为                                  

(4)上述实验中能达到实验目的且正确的是                (填字母).

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题型:阅读理解

阅读理解。

     In a recently published book , I came across some exercises with interesting names such as fishbone

diagrams , lotus flowers and clustering . As I used these exercises in my classes , I noticed that students

were interested . They said more and wrote more . They enjoyed expressing their ideas and sharing them

in groups .They were no longer passively waiting for the bell, but actively took part in the lesson . I find

that creativity can act as a way to increase participation and improve fluency (流利程度).

     Creativity has become a popular word in recent years . Scholars in the arts ,psychology (心理学),

business , education , and science are all working to get a deeper understanding of it . Robert J.

Sternberg is a creativity specialist and Yale professor of psychology. He defines creativity as "the ability

to produce work that is both new (original) and appropriate (applicable to the situation)". This definition

is useful, as we want our students to use language in a new way, and to use it correctly and properly.

Most scholars say there are two types of creativity: big "C" creativity and small "c" creativity. Big "C"

creativity refers to genius level thinking that results in artistic masterpieces and scientific breakthroughs.

Small "c" creativity refers to everyday level thinking that can be used in any situation. Our emphasis is on

the latter. While it goes without saying that any of our students could go on to be the next Picasso or

Edison, our aim is to help students produce more ideas and use language in new ways .

1.The underlined words "waiting for the bell" in the first paragraph probably mean        .

A. longing for a phone call

B. hoping to have a bell

C. expecting the end of the class

D. wanting to speak in class

2. It can be inferred from the passage that the author thought the exercises in the book were  ____ .

A. popular 

B. useful

C. scientific

D.creative

3.When you use a very familiar word in a new way , you are        .

A. creative in the sense of big "C" creativity

B. creative in the sense of small "c" creativity

C. not creative in the sense of big "c" creativity

D. not creative in the sense of small "c" creativity

4.The main purpose of the passage is to        .

A. show how useful the book is        

B. explain what creativity is

C. discuss how one can be creative  

D. tell what teaching aims at

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