问题 选择题

极少数青少年有吸烟的坏习惯.香烟燃烧的烟气中有许多强致癌物质,其中对人体危害最大的是尼古丁[C10H14N2]、焦油、一氧化碳等,下列说法错误的是[ ]

A.吸烟严重危害人的身心健康

B.尼古丁由碳、氢、氮元素组成

C.尼古丁中碳、氢、氮元素的质量之比为10:14:2

D.一氧化碳能与血液里的血红蛋白结合,有剧毒

答案

答案:C

阅读理解

If you want to be a volunteer, you have to answer the following typical questions. Do you want to work with people, animals or machines? Do you want to work indoors or outdoors, directly serve people in need or serve people behind the scenes? Every year, thousands of people in the west offer volunteer service. Volunteering greatly strengthens the community because it helps the old, the young, the weak, the sick, and the disabled and the injured to solve problems.

Volunteers usually help in many different ways. They may give people advice, offer friendship to the young, drive the elderly to church (if up to the driving age), advise kids against drugs, work as assistants in schools or nursing homes, raise funds, plant trees, help out in local libraries and do many other things. Volunteering can be a few hours a week or a few hours a month. Anybody who wants to serve people in need can become a volunteer.

In fact, the art of volunteering is a process of both giving and receiving. Volunteering allows volunteers to meet new people, make new friends and mix with people from all walks of life. Volunteering is an excellent way to experiment and try out new techniques and skills, discover your individual talents and explore career choice. Being a volunteer will take you on a wonderful journey and help you learn more than what you can get from books.

小题1:

As a volunteer, only when you grow old enough can you _______.

A.plant trees on hills

B.drive the elderly to church

C.give advice to others

D.help out in local libraries小题2:

. How is the second paragraph mainly developed?

A.By listing examples.

B.By comparing.

C.By giving explanations.

D.By discussing.小题3:

It can be inferred from the passage that to be a volunteer, _______.

A.you can do experiments

B.you must be very strong

C.you need to work very long

D.you can get something valuable小题4:

What’s the best title of the passage?

A.How to hunt for jobs

B.Volunteer service in the west

C.How to make friends

D.How to work with animals

单项选择题 A1型题