当可靠度大于0.6827时，抽样极限误差（）A、大于抽样平均误差 B、小于平均误差

关于青春期龈炎，下列描述错误的是（）。

A.指发生于青春期的慢性非特异性龈炎

B.患者多表现口腔卫生较差，牙石较多

C.与青春期的性激素分泌有关

D.好发于上下整个牙列的牙间 * * 和龈缘

E.一般无明显自觉症状

阅读理解。

     When women sit together to watch a movie on TV, they usually talk simultaneously (同时的) about a

variety of subjects, including children, men, careers and what's happening in their lives. When groups of

men and women watch a movie together, the men usually end up telling the women to shut up. Men can

either talk or watch the screen-they can't do both-and they don't understand that women can. Besides,

women consider that the point of all getting together is to have a good time and develop relationships-not

just to sit there like couch potatoes staring at the screen.

     During the ad breaks, a man often asks a woman to explain the plot and tell him where the relationship

between the characters is going. He is unable, unlike women, to read the subtle body language signals that

reveal how the characters are feeling emotionally. Since women originally spent their days with the other

women and children in the group, they developed the ability to communicate successfully in order to

maintain relationships. For a woman, speech continues to have such a clear purpose: to build relationships

and make friends. For men, to talk is to relate the facts.

     Men see the telephone as a communication tool for sending facts and information to other people, but

a woman sees it as a means of bonding. A woman can spend two weeks on vacation with her girlfriend

and, when she returns home, telephone the same girlfriend and talk for another two hours.

     There is no convincing evidence that social conditioning, the fact that girls' mothers talked them more,

is the reason why girls talk more than boys. Psychiatrist Dr Michael Lewis, author of Social Behavior and

Language Acquisition, conducted experiments that found mothers talked to and looked at, baby girls more

often than baby boys. Scientific evidence shows parents respond to the brain bias of their children. Since

a girl's brain is better organized to send and receive speech, we therefore talk to them more. Consequently,

mothers who try to talk to their sons are usually pointed to receive only short grunts in reply.

1. While watching TV with others, women usually talk a lot because they _____.

A. are afraid of awkward silence with their families and friends

B. can both talk and watch the screen at the Same time

C. think they can have a good time and develop relationships

D. have to explain the plot and body language to their husbands

2. After a vacation with her girlfriend, a woman would talk to her again on the phone for hours in order

    to _____.

A. experience the happy time again

B. keep a close tie with her

C. recommend her a new scenic spot

D. remind her of something forgotten

3. What does the author want to tell us most?

A. Women's brains are better organized for language and communication.

B. Women love to talk because they are more sociable than men.

C. Men do not like talking because they rely more on facts.

D. Social conditioning is not the reason why women love talking.

4. Which of the following would be the best title for the passage?

A. Women Are Socially Trained to Talk

B. Talking Maintains Relationships

C. Women Love to Talk 　

D. Men Talk Differently from Women

酒中的苦味，有人认为形成的物质主要是过量的高级醇，过量的琥珀酸，少量的单宁，较多的酚类和糠醛所引起的。另外（）等物质都呈现苦味。

A.异丁醇

B.正丙醇

C.酪醇

D.生物碱

新城区开发房地产具有的不利条件有( )。

A．增加安置补偿费开支
B．获得土地非常困难
C．规划设计条件苛刻
D．市政配套设施缺乏

油脂类涂料都有自干能力。