异烟肼体内过程特点是A．口服易被破坏 B．与血浆蛋白结合率高 C．乙酰化代谢速度个体

冠周炎最好发的牙位是（）

A.左上6和右上6

B.左上8和右上8

C.左下6和右下6

D.左下8和右下8

E.左下5和右下5

真理都有自己适用的范围，这说明了   

A．真理是普遍的

B．真理是主观的

C．真理是有条件的

D．真理是绝对的

描述概念模型的常用方法是( )。

A．建立数据模型方法

B．需求分析方法

C．二维表方法

D．实体-联系方法

射精管开口于

A．前列腺中叶

B． * * 球部

C． * * 膜部

D．精囊腺

E． * * 前列腺部

In our society, we must communicate with other people. A great deal of communicating is performed on a person-to-person (1) by the simple means of speech. If we travel in buses, stand in football match (2) , we are likely to have conversations (3) we give information or opinions, and sometimes have our views (4) by other members of society.

Face-to-face contact is (5) the only form of communication, and during the last two hundred years the (6) of mass communication has become one of the dominating factors of contemporary society. Two things, (7) others, have caused the enormous growth of the communication industry. Firstly, inventiveness has (8) advances in printing, photography and so on. Secondly, speed has revolutionized the (9) and reception of communications so that local news often (10) a back seat to national news.

No longer is the possession of information (11) to a privileged minority. Forty years ago people used to (12) to the cinema, but now far more people sit at home and turn on the TV to watch a program that (13) into millions of houses. Communication is no longer merely concerned (14) the transmission of information. The modern communications industry influences the way people live in society and broadens their horizons by allowing (15) to information, education and entertainment. The printing, broadcasting and advertising industries are all (16) with informing, educating and entertaining. (17) a great deal of the material communicated by the mass media is very valuable to the individual and to the society (18) which he is a part, the vast modern network of communications is (19) to abuse. However, the mass media are with us for better, for worse, and there is no turning (20) .

6（）

A.art

B.device

C.way

D.method