问题 选择题

要比较准确地量取2mL盐酸,应使用的仪器是(  )

A.试管

B.标明容积的烧杯

C.100mL的量筒

D.10mL的量筒

答案

A、试管没有刻度,不能比较准确地量取2mL盐酸.故A错误;

B、烧杯的直径较大,影响测量的精确度.故B错误;

C、用100mL的量筒量取,会因刻度不精确而有误差.故C错误;

D、用量筒量取2mL盐酸,应选择略大于2mL的量程,所以10mL的量筒合适.故D正确.

故选D.

填空题
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 (创新) 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 reaching aims at