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【单选题】
Chinese Dialects(方言) 1.The enormous differences in Chinese dialects have been a continuing problem ever since China became an empire in 221 B.C., and it is one big reason why the country has remained impoverished(贫穷). Of the 600 million people who call themselves Chinese, all but a very small number speak Chinese.But the dialects vary so widely that the speech of Peking, for example, is as different from the speech o{ Canton as English is from German. 2.There is, to be sure, only one written language for all China, but it bears no phonetic(语言的)relationship to any of the spoken dialects.Moreover, it has so many symbols that only a tiny portion of the population has ever mastered it. 3.As a result, most Chinese have been isolated for centuries from a free flow of ideas and from the economic progress that such a flow produces.Many dynasties tried with little success to break down the wall.After recognizing the importance of having a literate people for working in a technological world and for developing an effective propaganda()machine, the present government is putting everything it has into tackling the language problem. But the obstacles are so formidable(难以应付的)that the results cannot yet be predicted. 4.At the heart the problem is the dialects.The dialects prevented the evolution of a single written language based on phonetics.Instead, the Chinese were forced to develop a system that has no relation to sound, and they have clung to it for more than 3,000 years.When this system is applied to a whole language, it results in an overwhelming number of symbols. 5.There are about 50,000 entries in a Chinese dictionary not counting the compounds(复合词).In order to be literate, a Chinese must learn 6,000 to be moderately educated,12,000.An English-speaking child, having to conquer only a twenty-six-letter alphabet,has usually learned to read by the time he begins the third grade.A Chinese child needs at least five more years of elementary learning in the seventh grade, he can barely read a Chinese newspaper.
A.
Dealing with the Problem of Various Dialects
B.
Difficulties in Learning Chinese
C.
Features of Chinese Dialects
D.
Differences in Chinese Dialects
E.
Dialects as Heart of the Problem
F.
Ways of the Government to Tackle the Problem 第 23 题 Paragraph 1____。
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【判断题】当肾上腺素分泌增加时,它可进入细胞内 : 1促进糖原合成酶磷酸化而失去活性。2共价修饰磷酸化酶,使其磷酸化,活性增加。
A.
正确
B.
错误
【单选题】关于酶的共价磷酸化的描述错误的是
A.
磷酸化和去磷酸是由不同的酶催化
B.
磷酸化时酶活性增强,去磷酸化时酶活性降低
C.
磷酸化或去磷酸时还可伴有亚基的聚合和解聚
D.
磷酸化可发生在酶蛋白肽链上的特定部位
E.
磷酸化时消耗ATP
【多选题】通常的触电形式有()、()和()。
A.
单相触电
B.
两相触电
C.
三相触电
D.
跨步电压触电
【简答题】A.糖原合成酶 B.糖原磷酸化酶 C.二者都是 D.二者都不是 磷酸化时活性增高 A. B. C. D.
【多选题】关于糖原分解中酶化学修饰的下列描述中,正确的有:
A.
有活性的磷酸化酶b激酶被磷酸化成为无活性的磷酸化酶b激酶
B.
有活性的磷酸化酶b激酶催化磷酸化酶b磷酸化
C.
磷酸化酶a为磷酸化酶的有活性形式
D.
蛋白激酶A活性增强时,糖原分解增强
【单选题】㨰法操作时,腕关节屈曲向外㨰动的幅度是
A.
40 º
B.
60 º
C.
80 º
D.
120 º
【判断题】2016年10月以后,特别提款权的四种定值货币变为美元、欧元、日元和英镑( )
A.
正确
B.
错误
【判断题】2016年10月以后,特别提款权的四种定值货币变为美元、欧元、日元和英镑。
A.
正确
B.
错误
【简答题】触电的形式通常有____触电、____触电和____触电三种。
【单选题】㨰法操作时,腕关节屈曲向外㨰动时的幅度是
A.
40 °
B.
60 °
C.
80 °
D.
120 °
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