问题 单项选择题

关于速度和加速度,下列说法中正确的是()

A.加速度大的物体速度变化大

B.加速度大的物体速度变化快

C.加速度为零的物体速度也为零

D.速度越来越大,加速度也一定越来越大

答案

参考答案:B

解析:加速度是表示速度变化快慢的物理量,加速度的大小与速度、速度变化量的大小没有直接关系,AC错;B对;速度越来愈大只是因为加速度的方向与速度方向相同,并不能说明加速度也在增大,D错

解答题
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 taking part in the lesson. I find that creativity can act as a way to increase participation and improve fluency.

Creativity has become a popular word in recent years. Scholars in arts, psychology, business, education and science are all working to get a deeper understanding of it. Robert J. Stemberg 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. Mot 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 a new way.

小题1:The underlined words “waiting for the bell ” in the first paragraph probably means______.

A.longing for a phone call

B.hoping to have a bell

C.expecting the end of the class

D.waiting to speak in the class小题2: It can be inferred from the passage that the author thinks the exercises in the book were _____.

A.popular

B.useful

C.scientific

D.creative小题3:When you use a 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.

小题4:The main purpose of the passage is to _________.

A. show how useful the book is.

B, explain what creativity 

C. discuss how one can be creative 

D. tell what reaching aims at