问题 选择题

属于细胞质中的能量转换器的是      (    )

①细胞核   ②叶绿体   ③液泡   ④线粒体

A.①②

B.②③

C.②④

D.③④

答案

答案:C

题目分析:植物细胞中能量转换器有叶绿体和线粒体两个,分别是进行光合作用,制造有机物储存能量的结构和进行呼吸作用,分解有机物释放能量的结构;动物细胞中能量转换器只有线粒体一个,是进行进行呼吸作用,分解有机物释放能量的结构,所以属于细胞质中的能量转换器的是线粒体和叶绿体,选C

单项选择题
完形填空

Several factors make a good newspaper story.First—obviously—it must be new.But since TV can react to events so quickly,this is often a problem for __61  .They usually respond to it in one of three ways.

●  By providing __62 detail,comment or background information.

●  By finding a new __63on the day's major stories.

●  By printing completely different stories which TV doesn't broadcast.

What else? Well—it also has to be __64 .People don't want to read about ordinary,everyday life.Because of this,many stories __65 some kind of conflict or danger. This is one reason why so much news seems to be __66 news.“Plane lands safely—no one hurt”doesn't sell newspapers.“Plane__67 —200 feared dead!”does.

Next,there's human interest. People are interested in other __68  particularly in the rich,famous and powerful.Stories about the private lives of pop singers,actors,models,politicians, __69 all appear regularly in certain newspapers.

Finally,for many editors, __70 is an important factor,too.They prefer stories about people,places and events which their readers know.That's why the stories in Tokyo's newspapers are often very different from the stories printed in Paris,Cairo,New York or Buenos Aires.

61.A.newspapers      B. publications      C. reporters         D. broadcasters

62.A.extra           B. available         C. inaccessible      D. memorable

63.A.direction       B. look              C. angle             D. section

64.A.tragic          B. dramatic          C. professional      D. sensitive

65.A.quote           B. neglect          C. increase          D. involve

66.A.good            B. bad               C. exciting          D. informative

67.A.crashes         B. bumps             C. strikes           D. drops

68.A.places          B. people            C. things            D. news

69.A.in addition     B. in any case       C. for example       D. after all

70.A.personality     B. similarity        C. uniqueness        D. familiarity