It is virtually impossible to estimate the number of people in the world who have acquired an adequate working knowledge of English in addition to their own language. The purposes for which English is learned and the situations in which such learning takes place are so varied that it is difficult to define and still more difficult to assess what constitutes an adequate working knowledge for each situation.
The main reason for the widespread demand for English is its present-day importance as a world language. Besides serving the infinite needs of its native speakers, English is a language in which some of the most important works in science, technology, and other fields are being produced, and not always by native speakers. It is widely used for such purposes as meteorological and airport communications, international conferences, and the dissemination(传播)of information over the radio and television networks of many nations. It is a language of wider communication for a number of developing countries, especially former British colonies. Many of these countries have multilingual populations and need a language for internal communication in such matters as government, commerce industry, law and education as well as for international communication and for access to the scientific and technological development in the West.
There are about 260 million people who can speak ______.
A.English in its regional variety
B.English in its standard variety
C.English as a second language
D.English as a working language
第2题
X线检查中膀胱癌有定性诊断价值的表现是
A、膀胱区充盈缺损
B、肾盂积水
C、输尿管扩张、积水
D、膀胱壁规整、僵直
E、膀胱钙化
第5题
诊断膀胱癌最直接、可靠的检查是
A.静脉肾盂造影
B.肾动脉造影
C.X线检查
D.B超检查
E.膀胱镜检查
第7题
A.双重对比造影两者等同
B. 癌与结石均不随体位改变而移动
C. 膀胱癌浸润膀胱壁,使膀胱壁不光整和硬化
D. 膀胱癌的充盈缺损边缘不光整,而结石则光滑
E. X线平片易于诊断结石
第8题
A.双重对比造影两者等同
B. 癌与结石均不随体位改变而移动
C. 膀胱癌浸润膀胱壁,使膀胱壁不光整和硬化
D. 膀胱癌的充盈缺损边缘不光整,而结石则光滑
E. X线平片易于诊断结石
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!