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有关消化性溃疡的病史，下列哪项描述不正确
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Throughout history, people have been interested in knowing how language first began, but no one knows exactly where or how this happened. However, we do know a lot about languages, the languages of today and also the languages of earlier times. There are probably about three thousand languages in the world today. Chinese is the language with the most speakers. English, Russian and Spanish are also spoken by millions of people. On the other hand, some languages in the world have less than one hundred speakers.
There are several important families of languages in the world. For example, most of the languages of Europe are in one large family called Indo-European. The original (最初的) language of this family was spoken about 4,500 years ago. Many of the present languages of Europe and India are modern forms of the language of 4,500 yeas ago.
Languages are always changing. The English of today is very different from the English of 500 years ago. Some even die out completely. About 1, 000 years ago English was a little-known relative of German spoken on one of the borders of Europe.
If a language has a large number of speakers or if it is very old, there may be differences in the way it is spoken in different areas. That is, the language may have several dialects. Chinese is a good example of dialect differences. Chinese has been spoken for thousands of years by millions of speakers. Their differences between the dialects of Chinese are so great that speakers of Chinese from some parts of China cannot understand speakers from other parts.
The first paragraph mainly tells us that ______.
从我国的基本国情出发，对出境旅游业务经营权实行特许制度：国家旅游局坚持()。
女，36岁，因外伤出血无尿10日入院。体温38.90C、血压80/40mmHg、重度贫血貌、左下肢大面积肌肉坏死、皮肤溃烂。血Hb68g/l、WBC15乘以十的九次方/L、血尿素氮25.1mmol/L、血肌酐726.5umol/乙
该患者肾衰最可能的诊断是
下列命题中属于近代形而上学唯物主义的是()
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