问题 实验题

读出下列读数:图甲中天平的示数是       g;图乙中物体的长度的是      cm;图丙中弹簧测力计的示数是      N.

答案

13.4     2.06-2.09    4.6

题目分析:甲图中,物体的质量为m=10g+3.4g=13.4g

乙图中,刻度尺的分度值为1mm,铅笔的长度为L=7.05cm-5.00cm=2.05cm

丙图中,弹簧测力计的示数为F=4.6N

所以答案为:13.4     2.06-2.09    4.6

点评:用天平测量物体质量时,被测物体质量等于砝码总质量加上游码所对的刻度.

在使用刻度尺测长度时,需要明确刻度尺的分度值,并估读到分度值的下一位.

读取弹簧测力计的示数时,需要先明确其分度值,视线要与刻度盘相垂直.

阅读理解

阅读理解。

     "Well, we're in our new house. Let's get a new pet to go along with it," Mrs. Brown said to her husband.

     "That sounds like a very good idea," he answered. "Do you want to see the ads in the newspaper?"

     "Let's go to the animal shelter. Many pets there need homes. Since tomorrow is Saturday, we can both

go," she said.

     The next morning the Browns met Mr. Snow at the animal shelter. "We want to be sure that the pets here

go to good homes," Mr. Snow said,"So I need to ask you some questions."

     After they talked for a while, the Browns decided to get a small dog. It wouldn't need a big house or a big

yard. A small dog would bark (吠) and warn (警告) them if someone tried to break into their house. After

Mr. Snow gave the Browns a book on pet care, they chose one and wanted to take her home right away. But

the animal doctor hadn't examined her yet. So Mr. Snow told them to return on Sunday.

     On Sunday afternoon the Browns went to the animal shelter. The animal doctor said, "Shadow has had all

of her shots (预防针). She will be healthy." The Browns thanked the doctor and took Shadow home.

1. From the reading we learn that _____.

A. the Browns have never had a pet before

B. the Browns knew about Shadow from the newspaper

C. Shadow is a small and healthy dog

D. Mr. Brown didn't quite agree with his wife

2. The word shelter in the reading means _____.

A. a place to sell small dogs

B. a place to keep homeless animals

C. a place to study animals

D. a place to sell books on pet care

3. Mr. Snow asked the Browns some questions to _____.

A. see if they had moved to a new house

B. find out how rich the Browns were

C. know where they'd keep their new pet

D. make sure they'd take good care of pets

4. The Browns think that a small dog _____.

A. doesn't need any room to keep

B. can help them watch their house

C. eats less food than a bigger one

D. usually has a beautiful name

5. It's clear that _____.

A. Shadow will not be easy to get ill

B. the Browns were not pleased with Shadow

C. Mr. Snow didn't examine Shadow at all

D. Shadow likes barking a lot

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