( )时,宦官蔡伦集中了前人的经验,用树皮、麻头、敝布、破鱼网造纸,由于价格低廉,以

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问题:

( )时,宦官蔡伦集中了前人的经验,用树皮、麻头、敝布、破鱼网造纸,由于价格低廉,以后全国普遍制造,人们就把这种纸称作“蔡侯纸”。

A.西汉昭帝

B.西汉宣帝

C.东汉和帝

D.东汉哀帝

考点:普通考研历史学专业基础综合秦汉(三)
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斜井人车运行前应作那些检查?

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客运列车发生冲突,当场死亡2人,轻伤3人,此事故属重大事故。

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In June 1985, two British mountaineers Joe Simpson and Simon Yates made the first-ever climb of the 21,000-foot snow-covered Siula Grande mountain in Peru. It was an exceptionally (26) job, but nothing compared to what was to (27) . Early in the process, Simpson (28) and broke his right knee. Yates could have (29) him but managed to find a way of (30) him down the mountains on a rope in a series of difficult drops. Then Simpson fell into a crevasse and Yates eventually had no (31) but to cut the (32) , completely convinced that his friend was now (33)

In his book on the (34) , Joe Simpson wrote:

(35) I looked at the distant moraines, I know that I must at least try I would probably (36) there among those rocks. If I died, well, that wasn’t so (37) , but I wouldn’t have (38) waited for it to happen. The (39) of dying no longer affected me as it had in the crevasse at first. I now had a chance to (40) it and struggle against it.

The survival of Yates himself was (41) . That Simpson somehow found a way of (42) out of the crevasse after 12 hours and then crawled and (43) himself six miles back to camp, (44) three days and might without food or drink, would be considered as a heroic fiction. But in fact it was so (45) .

45().

A. particular

B. usual

C. true

D. interesting

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心理学实验表明,只靠耳朵听的知识,3个小时后只能记住65%左右;只靠眼睛看的知识,3个小时后可保持70%左右,3天后能记住30%左右;而视听结合获得的知识,3个小时后能保持85%左右,3天后能保持70%左右。这个实验告诉我们提高记忆力需要()

A.掌握系统优化的方法

B.要重视量的积累

C.坚持有发展的观点看问题

D.把握好实践和认识的关系

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在种鸡场及商品鸡生产中,用于表示群体产蛋数的两个指标是()和()。

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