阅读理解。 I've always known my kids use dig

题型:阅读理解

问题:

阅读理解。

     I've always known my kids use digital communications gear (装置) a lot. But my cellphone

bill last month really grabbed my attention. My son had come up to nearly 2,000 incoming text

messages, and had sent nearly as many. Of course, he was out of school for the summer and

communicating more with friends from a distance. Nevertheless, he found time to hold down a

summer job and complete a college course in between all that typing with his thumb.

     I was even more surprised to learn that my son is normal. Teenagers with cellphones each

send and receive 2,272 text messages a month on average, Nielsen Mobile says.

     Some experts regret that all that keyboard jabber is making our kids stupid, unable to read

nonverbal cues such as facial expressions, gestures, posture and other silent signals of mood

and attitude. Unlike phones, text messaging doesn't even allow transmission of tone of voice or

pauses, says Mark Bauerlein  author of a book called The Dumbest Generation: How the Digital

Age Stupefies Young Americans and Jeopardizes (危害) Our Future.

     Beyond that, though, I'm not sure I see as much harm as critics of this trend. I've posted before

on how I initially tried to control my kids' texting. But over time, I have seen my son suffer no

apparent ill effects, and he gains a big benefit, of easy, continuing contact with others.

     I don't think texting make kids stupid. It may make them annoying, when they try to text and

talk to you at the same time. And it may make them distracted, when buzzing text messages

interrupt efforts to noodle out a math problem or finish reading for school.

     But I don't see texting harming teens' ability to communicate. My son is as accustomed to

nonverbal cues as any older members of our family. I have found him more engaged and easier

to communicate with from a great distance, because he is constantly available via text message

and responds with faithfulness and speed.

1. What does the underlined word "distracted" in the fifth paragraph mean?

A. Confused.                          

B. Absentminded.

C. Comfortable.                        

D. Badtempered.

2. What would be the best title for this passage?

A. For Teens, Texting Instead of Talking              

B. For Parents, Caring Much for Their Kids

C. Advantages and Disadvantages of Texting            

D. The Effect of Communication

3. What is Mark Bauerlein's attitude towards texting?

A. It is so convenient for teens to communicate with others.

B. It is likely to cause trouble in understanding each other.

C. It is convenient for teens to text and call at the same time.

D. It will cause damage to the development of intelligence.

4. The author's attitude towards texting is ________.

A. suspicious                  

B. opposed

C. supportive                  

D. doubtful

5. According to the passage, which of the following statements is NOT true?

A. It is normal for a teen to send or receive 60 text messages a day.

B. Texting is a very popular way of communication among teens.

C. Parents don't mind teens' texting and talking at the same time.

D. The writer limited his son to sending or receiving text messages at first.

考点:社会现象类阅读
题型:阅读理解

变频补水泵的扬程,可按补水压力比系统补水点压力高()PA、确定。

A、10~30

B、30~50

C、50~80

D、80~100

题型:阅读理解

按要求完成下列操作:新建文档WD6

  • D.DOC,插入文档WT6A.DOC,在表格最后一列之后插入一列,输入列标题“总分”,计算出各位同学的总分。将表格设置为列宽2厘米,行高20磅,表格内的文字和数据均水平居中和垂直居中。存储为文档WD6D.DOC。
  • 题型:阅读理解

    ①科学家已经分离出一种看起来能决定人体衰老速度的基因序列。这一发现首次将DNA与人类寿命联系起来。②这项研究有望为创建筛查程序铺平道路,可用于检验哪些人更容易衰老,并在年轻时更容易患心脏病或其他疾病。③尽管这项突破不太可能带来大幅延长人类寿命的药物,但也许有助于延长那些由于自身基因而更易早逝的病人的寿命。④这项研究显示出了时间性衰老和生物性衰老的区别,其中生物性衰老取决于人体基因组成和生活方式,比如饮食组成和是否吸烟;两个年龄相同的人,其生物年龄可能会有十多年差异。⑤由桑尼教授带领的研究小组发现,一段普通DNA序列与人体的生物性衰老有密切关系。对近三千人的研究显示,约有38%的人带有遗传性基因变体,与没有这一基因序列的人相比,他们的生物年龄要老三到四岁;占总数7%的人带有两个这种基本变体,他们的生物年龄比没有该变体的人要老六到七岁。⑥通常被认为是老年病的发病年龄有很大的______,正是这一点促使研究者展开了这项研究。⑦我们身体中的大部分细胞都含有叫作染色体的DNA分子链。染色体在其两端有保护帽,叫做端粒。细胞每次分裂时,端粒会缩短,就像鞋带两端的塑料会被磨损一样。当端粒变得非常短时,细胞就无法正常工作,会显现衰老的征兆。⑧通过对血液样本的分析,桑尼发现,这些人具有与其年龄不相称的过短染色体端粒。而一种特定的基本序列在这些人中更常见。这段DNA位于3号染色体,与基因TERC相邻。⑨基因TERC可以制造出一种酶,能在端粒缩短时对端粒进行修复。携带有一个或两个该基因序列的人,在母体子宫中发育时,制造出的这种酶(端粒酶)可能比较少。这意味着,这些人在出生时端粒就比较短,所以更容易衰老。⑩科学家不可能通过增加人体中的端粒酶的数量来逆转人体老化的过程。人出生后,体内的端粒酶几乎全处于被抑制状态,但在癌细胞中端粒酶被激活,所以癌细胞就会无限分裂下去而不会死亡。因此桑尼指出:“激活端粒酶也许可以让你不得心脏病,但如果不加控制地激活端粒酶,你也许会得癌症。”

    与文中提到影响人生物性衰老的因素无关的一项是( )。

    A.是否抽烟
    B.饮食组成
    C.特定基因
    D.母体子宫

    题型:阅读理解

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    题型:阅读理解

    道路交通系统中的人包括驾驶员、行人、乘客和()等。

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    B.行人

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