问题 选择题

长期吸烟可能会引起                                         (   )

A.肝癌

B.胃癌

C.心脏病

D.肺癌

答案

答案:D

分析:此题考查的知识点是吸烟的危害.解答时可以从吸烟对呼吸系统、对他人的危害、长期吸烟的危害方面来切入.

解答:解:香烟中含有1400多种成分.吸烟时产生的烟雾里有40多种致癌物质,还有十多种会促进癌发展的物质,其中对人体危害最大的是尼古丁、一氧化碳、焦油和多种其它金属化合物.香烟烟雾中大量的一氧化碳同血红蛋白的结合能力比氧大240-300倍,严重地削弱了红细胞的携氧能力,因此,吸烟使血液凝结加快,容易引起心肌梗塞、中风、心肌缺氧等心血管疾病.更为严重的是,吸烟者还严重妨碍他人健康.研究结果表明,吸烟者吸烟时对旁人的危害比对他自己还大.有关医学研究表明,吸烟是心脑血管疾病、癌症、慢性阻塞性肺病等多种疾患的主要危害因素,吸烟已成为继高血压之后的第二号全球健康杀手.长期吸烟者的肺癌发病率比不吸烟者高10倍至20倍,喉癌发病率高6至10倍,冠心病发病率高2至3倍,循环系统发病率高3倍,气管类发病率高2至8倍.被动吸烟的危害更大,每天平均1小时的被动吸烟就足以破坏动脉血管.一些与吸烟者共同生活的女性,患肺癌的几率比常人多出6倍.

故选:D

阅读理解

阅读理解

Be Happy

Lioyd Morris

    "The days that make us happy make us wise."--John Masefield.

    When I first read this line by England's Poet Laureate(桂冠诗人),I was amazed.What did Masefield

mean?Without thinking about it much,I had always  assumed that the opposite was true.But his calm

assurance(自信) was remarkable.I could not forget it.

   Finally ,I seemed to grasp his meaning and realized that here was a profound (意义深远的)observation.The wisdom that happiness makes possible lies in clear understanding,not fogged by anxiety nor dimmed(变暗淡) by despair and boredom,and without the blind spots caused by fear.

   Active happiness-not more satisfaction or contentment-often comes suddenly,like an April shower or

the unfolding of a bud(蓓蕾).Then you discover what kind of wisdom has accompanied it.The grass is

greener;bird songs are sweeter;the shortcomings of your friends are more understandable and more

forgivable.Happiness is like a pair of eyeglasses correcting your spiritual vision.

   The insight of happiness are not limited to what is near around you.Unhappy ,with your thoughts turned in

upon your emotional sadness,your vision is cut short as though by a wall.Happy ,the wall crumbles(倒塌).

     The long vista(展望)is there for the seeing.The ground at your feet,the world about you-people ,

thoughts,emotions,pressures-are now fitted into the larger scene.Everything assumes a fairer proportion

(比例、关系).

     And here is the beginning of wisdom.

1.After reading the line by Masefield,the writer felt surprised.Why?

A.Because he didn't expect such a poet would have written such a line

B. Because he had never thought about that before

C. Because he thought it was impossible to be both happy and wise

D. Because he thought it rubbish for Masefield to write something like that

2.what makes being both happy and happy possible?

A.Significance    

B.comprehension  

C.Cooperation    

D.Responsibility

3.According to the writer ,when does active happiness happen?

A.happiness occurs when t rains in April spring

B.active happiness happens when a bud unfolds

C.it occurs when your understanding of everything is better

D.it happens out of our expectation

4.What is the beginning of wisdom?

A.taking a long view of things      

B.looking at things from different angles

C.considering advantages and disadvantages

D.sweeping down irresistibly from a commanding height

多项选择题