数据流程图描述了数据运动状况，其中的数据及其属性和关系需由 【11】 来定义。

下列对自身抗体的论述哪一项是正确的

A．正常个体中不可能检出自身抗体

B．检出自身抗体即意味着发生了自身免疫病

C．非自身免疫病患者体内也可检出自身抗体

D．正常人到老年期，自身抗体的检出率明显降低

E．上述选项均不对

阅读理解

    Growing up in Philadelphia, Lieberman started cooking with his stay-at-home dad when he was seven. His food-loving family had two kitchens, and he quickly learned what was the best way to bake his cakes. Lieberman improved his kitchen skills greatly during a year abroad before college, learning from a cook in Italy and studying local specialties (地方特色菜) in Germany, Spain and France. At Yale, he was known

for throwing dinner parties, single-handedly frying and baking while mixing  drinks for dozens of  friends.

Just for fun, he  and some friends  decided to  tape a show named Campus  Cuisine  about his  cooking.

Lieberman was a real college student  showing his  classmates how to do things  like make  drinks out of

dining-hall fruit. That  helped the  show become  very popular among  the students. They would stop

Lieberman after classes to ask for his advice on cooking. Tapes of the show were passed around, with

which his name went beyond the school and finally to the Food Network.

    Food Network producer Flay hopes the young cook will find a place on the network television. He

says  Lieberman's  charisma is key. "Food TV isn't  about food  anymore," says Flay. " "It' s about your

personality(个性) and finding a way to keep people's eyeballs on your show."

    But Lieberman isn't putting all his eggs in one basket. After taping the first season of the new show,

Lieberman was back in his own small kitchen preparing sandwiches. An airline company  (航空公司)

was looking for someone to come up with a tasteful, inexpensive and easy-to-make menu to serve on its

flights. Lieberman got the job.

1. We can learn from the text that Lieberman's family _______.

A. have relatives in Europe

B. love cooking at home

C. often hold parties

D. own a restaurant

2. The Food Network got to know Lieberman _______.

A. at one of his parties

B. from his teachers

C. through his taped show

D. on a television program

3. What does the word "charisma" underlined in the text refer to?

A. A natural ability to attract others.

B. A way to show one's achievement.

C. Lieberman's after-class interest.

D. Lieberman's fine cooking skill.

4. Why did the airline company give Lieberman the job?

A. He could prepare meals in a small kitchen.

B. He was famous for his shows on the Food TV.

C. He was good at using eggs to make sandwiches.

D. He could cook cheap, delicious and simple meals.

5. What can we learn about Lieberman from the text?

A. He is clever but lonely.

B. He is friendly and active.

C. He enjoys traveling around.

D. He often changes his menus.

 阅读理解。                                                                              

     I began to send e-mails when I was 17.  I discovered Google 5 years later.  Now, I use the Internet all

 the time.  Internet has become so popular that 90 percent(％) of 12-to-17-year-olds in the United States

  use the Internet, and about half of these children use it every day.  They visit chat (聊天) rooms and

 send e-mails.  They go to websites to get information for their homework.

     "Kids are now living in a virtual (虚拟的) world," says Greenfield, an expert at the University of

 California, "As the Internet is becoming more and more important for our life, we should worry about one

  question: Is the Internet good or bad for kids? "

     "It's difficult to answer the question because the Internet involves (涉及) so many things," says Justine,

  who is from Northwestern University.  "They include online computer games, news, messages and even

  e-mails to your grandmother. " So, more and more people believe that the online world can be helpful in

  some ways but dangerous in others.  

     "Although it's not easy to tell whether it's good or bad," says Justine, "the Internet, at least, is very useful

  and can be used widely by everyone in the world. "

1.  When did the writer discovered Google ?

    A.  at the age of 5                    

    B.  at the age of 12

    C.  at the age of 17                  

    D.  at the age of 22

2.  What percentage of American 12-to17-year-olds use the Internet every day?

    A.  About 45%.      

    B.  About 50%.

    C.  About80%.     

    D.  About 90%

3.  Some ideas about the Internet are mentioned EXCEPT (除了) _____.

    A. The Internet is a virtual world.

    B. The Internet is important for our life.

    C. We can send emails, get news and so on.

    D. It's not dangerous, so we can look through anything on the Internet.

4.  Which is the best title of the passage?

    A.  Don't Use the Internet        

    B.  Kids and Emails 

    C.  Is the Internet Good or Bad        

    D.  Two Experts from Universities

变速箱的功用是什么（）。

A、变速变扭，以适应经常变化的行驶条件

B、在不改变发动机曲轴旋转方向的前提下，使汽车能倒向行驶

C、利用空档，使发动机与传动系中断动力传递

D、为车辆提供更多动力

当你修改过人员或者地点或者事件信息后，需要进行什么操作，才能保证软件中设置的数据与巡检器的数据实时保持一致？（）

A.下载档案

B.线路设置

C.人员设置

D.计划设置