问题 选择题

关于温度、热量、比热和内能,下列说法正确的是(  )

A.物体的温度越高,所含热量越多

B.物体内能增大一定是吸了热

C.0℃的冰块,内能一定为零

D.一碗水倒掉一半后,其比热容不变

答案

A、热量是在热传递过程中,传递能量的多少,所以含有热量这种说法是错误的,A说法错误,不符合题意.

B、物体内能增大,可能是对物体做功,所以B说法错误,不符合题意.

C、一切物质的分子都在不停地做无规则运动,所以0℃的冰块也具有内能,C说法错误,不符合题意.

D、比热容是物质本身的一种特性,所以一碗水倒掉一半后,其比热容不变,D说法正确,符合题意.

故选D.

阅读理解

阅读下面短文并回答问题,然后将答案写在横线上(请注意问题后的词数要求)。

     [1]Do you want to work with people or animals or machines or tools? Do you want to work indoors or outdoors,directly serve people in need or serve people behind the scenes? These are the typical questions

that a volunteer service agency would ask.

     [2]Every year,thousands of people in the west offer volunteer services.Volunteering greatly strengthens the community partly because it helps the old, the young, the weak, the sick, the disabled and the injured

overcome difficulties.

     [3] Volunteers usually help in many different ways.They may give people advice, offer friendship to the young, drive the elderly to church, warn kids against drugs, work as an assistant in a school or a nursing

home, raise funds, plant trees, help out in local libraries and do many other things.

     [4]Volunteering can be a few hours a week or a few hours a month, time during the day, evenings or

weekends, either part time or full time. Anybody who likes to serve people in need ________.

     [5]The art of volunteering can be a process of both giving and receiving. Volunteering allows volunteers to meet new people and make new friends and mix with people from all walks of life. Volunteering is an

excellent way to experiment, practice and try out new techniques and skills. It is much more effective to

practice a skill than to read about or study it in a classroom. Volunteering is a great way to develop good

teamwork skills, discover your individual talents and explore career choices. Being a volunteer takes

individuals on a wonderful journey and helps them learn many important things beyond their school

learning.

1. What are the advantages of volunteer services for volunteers? (no more than 10 words)

________________________________________________________________________

2. What does the word "it" (Line 7, Paragraph 5) refer to?(no more than 3 words)

________________________________________________________________________

3. Why does the writer consider volunteering a process of both giving and receiving?(no more than 30

words)

________________________________________________________________________

________________________________________________________________________

4. Fill in the blank in Paragraph 4 with proper words.(no more than 6 words)

________________________________________________________________________

5. What's the title of this passage?(no more than 8 words)

________________________________________________________________________

问答题 简答题