问题 选择题

图中力对物体做功的是(  )

A.

人用力举着杠铃不动

B.

人用力把货物搬到车上

C.

人用力提水桶水平行走

D.

人用力推石头没有推动

答案

A、人用力举着杠铃不动,人给杠铃一个向上的力,杠铃 向上没有移动距离,人对杠铃没有做功.不符合题意.

B、人用力把货物搬到车上,人给货物一个向上的力,货物向上移动了距离,人对货物做功.符合题意.

C、人用力提水桶水平行走,人给水桶一个向上的力,水桶向上没有移动距离,人对水桶没有做功.不符合题意.

D、人用力推石头没有推动,人给石头一个向上的力,石头向上没有移动距离,人对石头没有做功.不符合题意.

故选B.

阅读理解

阅读理解。

     The 2008 National Teacher of the Year gave its prize to Michael Geisen, an American science teacher,

who is thirty-five years old and a forester (护林员). But he decided he would rather work with growing

minds than with growing trees.

     Seven years ago, Michael Geisen got master's degree in teaching and a job at a middle school. He brought

new energy to the science department there. He created school projects, and got parents' support in their

children's work. He always tried to be creative with each activity, and he didn't like using textbooks much.

One girl in his class said he could probably make it interesting to watch grass grow. During lunch, his students

come to his room to talk; get help, visit his turtle (海龟) and sometimes join him in playing the guitar. He

writes songs and develops games about science. He says one of his goals as a teacher is to create people who

will continue to learn throughout their lives.

     The National Teacher of the Year is a professional award (奖) in the United States. The program began in

1952. Each state chooses one teacher as the winner of the state teachers of the year. President George Bush

honored top teachers at the White House. He said that in Michael Geisen's first two years as head of the school

science department, students of his school got high scores on a state science test, and they were still improving.

     At the White House, Michael Geisen said that students are born to be creative, curious and alive, so we need

to really encourage students' creativity and their desire to learn useful skills to face the future world. Our job is

to educate the entire child.

1. From the text, we learn that Michael Geisen _____.

A. is an American writer.

B. has won the National Teacher of the Year twice.

C. wins support from the parents of his students.

D. got a master's degree when he was35.

2. The students of Michael Grisen think that their teacher is _____.

A. serious.

B. friendly.

C. strict.

D. rude

3. Which of the following is TRUE about the National Teacher of the Year program?

A. President George Bush started this program.

B. Each US state will decide one teacher every year.

C. It has been held worldwide each year since 2001.

D. The winners will have a chance to work at the White House.

4. From the passage we know that ______.

A. Michael Geisen won high scores in a state science test.

B. Michael Geisen is a famous scientist.

C. George Bush met Michael Geisen's students at the White House.

D. Michael Grisen is the head of the science department at his school.

名词解释