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A twenty-year-old immigrant, Levi Strauss, came to the United States in 1850 to seek his f

ortune in the gold fields. But strangely enough, this man made his fortune on heavy canvas that he found suitable for working clothes. Strauss'jeans were particularly good for prospectors and cowboys. In the early days of jeans, this man couldn't have guessed that his pants, made only for rough work, would become so popular at ail levels of society. Yes, this is a fact: jeans have become fashionable in our society. Furthermore, these pants have come to symbolize changes in social attitude.

In the last decade or two we have seen movements toward equality as well as defiance of authority. Jeans, now worn by everybody, can be said to symbolize these changes for the better. In the past, only men wore jeans, and these men were at the bottom—socially and economically. Jeans were worn by truck drivers, farm and factory workers. Today, jeans no longer are looked down upon. They are worn by both men and women, by both skilled and unskilled workers, by both employees and employers. This common way of dressing symbolizes respect for individuality, no matter what your occupation or sex. In the fight against authority, young people have been the leaders. So it is natural that teenagers would defy parents and school administrators over the right to wear jeans to class and win. Jeans are the typical dress of civil rights marchers, fans at rock concerts, "hippies" returning to nature, and serious college students. Because everyone can be comfortable in them, the blue jeans invented for the use of workers are now accepted almost anywhere, anytime. This is true not only in the United States, but in many other countries in the world. I strongly agree with the following statement: "Old or new, glorified or plain, jeans are likely to be around for a long time to come. Already they have succeeded where statesmanship has failed. Although unable to speak the same language, the inhabitants of this embattled planet have at least agreed to wear the same pants."

Jeans, originally designed by Levi Strauss, ______.

A.have become a symbol of the fashionable class

B.have come to symbolize changes in social attitude

C.are suitable wear for rough work only

D.are no longer so popular as they used to be

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第1题

鞣质是多元酚类化合物,可与之产生沉淀的是()A.蛋白质B.香豆素C.黄酮D.甾体E.皂苷

鞣质是多元酚类化合物,可与之产生沉淀的是()

A.蛋白质

B.香豆素

C.黄酮

D.甾体

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第2题

鞣质是多元酚类化合物,可与之产生沉淀的是A.香豆素B.蛋白质C.黄酮D.甾体E.皂苷

鞣质是多元酚类化合物,可与之产生沉淀的是

A.香豆素

B.蛋白质

C.黄酮

D.甾体

E.皂苷

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第3题

鞣质是多元酚类化合物,可与之产生沉淀的是()。A.蛋白质B.香豆素C.黄酮D.甾体E.皂苷

鞣质是多元酚类化合物,可与之产生沉淀的是()。

A.蛋白质

B.香豆素

C.黄酮

D.甾体

E.皂苷

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第4题

具有溶血作用的苷类化合物是A.蒽醌苷B.黄酮苷C.甾体皂苷D.萘醌苷E.香豆素苷

具有溶血作用的苷类化合物是

A.蒽醌苷

B.黄酮苷

C.甾体皂苷

D.萘醌苷

E.香豆素苷

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第5题

多为酚苷的是

A.蒽醌苷

B.黄酮苷

C.三萜皂苷

D.甾体皂苷

E.香豆素苷

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第6题

与明胶作用后形成水不溶性沉淀的是A.木脂素B.香豆素C.黄酮D.皂苷E.鞣质

与明胶作用后形成水不溶性沉淀的是

A.木脂素

B.香豆素

C.黄酮

D.皂苷

E.鞣质

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第7题

可与碘化铋钾试剂产生橘红色沉淀的是()A.甾体皂苷B.三萜皂苷C.生物碱D.羟基蒽醌类E.香豆素

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A.甾体皂苷

B.三萜皂苷

C.生物碱

D.羟基蒽醌类

E.香豆素

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第8题

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胆甾醇可与哪个成分生成难溶性的分子复合物

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B.甾体皂苷

C.黄酮

D.蒽醌苷

E.香豆素

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第9题

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A.蒽醌类化合物

B.黄酮类化合物

C.皂苷类化合物

D.香豆素类化合物

E.单宁类化合物

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第10题

由甾核和不饱和内酯环两部分组成的是A.强心苷苷元B.甾体皂苷C.黄酮D.蒽醌苷E.香豆素

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A.强心苷苷元

B.甾体皂苷

C.黄酮

D.蒽醌苷

E.香豆素

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