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听力原文:Paper is one of the most important products ever invented by man. Widespread use

听力原文: Paper is one of the most important products ever invented by man. Widespread use of written language would not have been possible without some cheap and practical material to write on. The invention of paper meant that more people could be educated because more books could be printed and distributed. Together with the printing press, paper provided an extremely important way to communicate knowledge.

How much paper do you use every year? Probably you cannot answer that question quickly. In 1900 the world's use of paper was about one kilogram for each person a year. Now some countries use as much as 50 kilograms of paper for each person a year. Countries like the United States, England and Sweden use more paper than other countries.

Paper, like many other things that we use today, was first made in China. In Egypt and the West, paper was not very commonly used before the year 1400. The Egyptians wrote on a kind of material made of a water plant. Europeans used parchment for many hundreds of years. Parch-ment was very strong; it was made from the skin of certain young animals. We have learnt of the most important facts of European history from records that were kept on parchment.

(29)

A.More jobs could be provided than before.

B.More people could be educated than before.

C.More books could be printed and distributed.

D.More ways could be used to exchange knowledge.

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第1题

关于AFP,下述错误的是()

A. 在胎儿早期由肝脏和卵黄囊合成

B. B.对诊断肝细胞癌及滋养细胞恶性肿瘤有重要的临床价值

C. C.原发性肝细胞癌患者血清AFP均增高

D. D.胃癌或胰腺癌时,血中AFP含量也可升高

E. E.妊娠3~4个月,孕妇AFP开始升高

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第2题

AFP检查对原发性肝癌的诊断意义,下述哪些是错误的()

A.最适宜普查,早期发现肝癌

B.继发性肝癌AFP多为阳性

C.可在症状出现前8~11个月呈阳性反应

D.AFP阴性即可排除肝癌

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第3题

下列关于AFP的说法,哪项是错误的A.肝细胞癌AFP的阳性率为70%~90%B.少数胃癌的AFP也可升高C.AFP的

下列关于AFP的说法,哪项是错误的

A.肝细胞癌AFP的阳性率为70%~90%

B.少数胃癌的AFP也可升高

C.AFP的浓度与肝癌的大小无关

D.肝癌血清中LCA结合型AFP比值大于25%

E.周围血中AFP mRNA可用于预测肿瘤的复发和转移

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第4题

关于肝腺瘤,下述说法错误的是()

A.好发于育龄女性

B.边缘清楚,有完整包膜

C.密度/信号不均匀,有脂质、出血

D.肝硬化及AFP升高

E.富血供:动脉期明显强化,肝胆期低信号

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第5题

关于甲胎蛋白(AFP)错误的是()

A.正常值<20ng/ml

B.生殖腺胚胎癌AFP增高

C.AFP>200ng/ml持续8周.可以诊断为原发性肝癌

D.AFP>500μg/L持续3周.可诊断为原发性肝癌

E.AFP升高在临床症状出现前6个月或更早发现肝癌

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第6题

关于生物-心理-社会医学模式,下述提法中错误的是

关于生物-心理-社会医学模式,下述提法中错误的是

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第7题

关于原发性肝癌,错误的是()。A、多无肝炎病史B、AFP 多明显升高C、多在肝硬化的基础上发生D、可有肝

关于原发性肝癌,错误的是()。

A、多无肝炎病史

B、AFP 多明显升高

C、多在肝硬化的基础上发生

D、可有肝区疼痛

E、可有腹胀

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第8题

关于会阴擦(冲)洗和冷热敷,下述错误的是 ()

关于会阴擦(冲)洗和冷热敷,下述错误的是 ()

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