题目内容
8.Deliberately making a road icy sounds like a method for disaster,but in 16th-century China it helped things run smoothly.Repairs to the Forbidden City in Beijing in 1557 called for huge stones from a quarry(采石场) more than 70km away.The biggest was the 300-ton"Large Stone Carving."Such stones were too heavy for any cart,and too fragile for rollers.The builders adopted a wise alternative approach to carry the heavy stone.The dug a series of wells,spaced a few hundred metres apart,along the route to the quarry.Then,in the depth of winter,when temperatures reached around-4C,buckets of water were poured on to the dirt track,transforming it into an ice road.
The stone blocks were pushed along the road on wooden sledges (雪橇).Modern engineers have calculated that it would take 1,500 workers to drag a sledge on the dirt road,but ony 300on ice.Ancient tests suggested the ice was made slippery with more water; this reduced the friction further and just 50 men could pulla sledge.This technique only works when the temperature is also close to zero,otherwise the film of water freezes too quickly.
The researchers at Princeton University estimated that the blocks could be moved at six metres a minute,and the journey could be completed in 28 days.This would be well before the spring when the ice would melt.
It was once suggested that similar ice-sledges transported Stonehenge stones,but the ground that had a lot of holes and comparatively mild conditions probably rule this out.
8.Why did people dig some wells along the road to the quarry?A
A.They wanted to build frozen roads.
B.They wanted to break up large stones.
C.They wanted to make the dirty track clean.
D.They wanted to get a lot of holes on the road.
9.What did people do to reduce the friction?B
A.They made stone blocks much smaller.
B.They poured more water on the ice road.
C.They waited until the temperature was very low.
D.They asked more than 1,500 workers to clean the dirty road.
10.How did the researchers at Princeton University think of Stonehenge stones?A
A.They were not likely to be carried on the icy road.
B.They had a longer history than stones in Beijing.
C.They were carried for over twenty-eight days.
D.They were broken up in the depth of winter.
11.What does the author intend to tell us in the the text?D
A.Making a road slippery on purpose may be bad idea.
B.The mild weather helped to carry Stonehenge stones.
C.Stonehenge stones were too heavy to carry.
D.Ancient Chinese transported huge stones wisely.
分析 本文是一篇科教类阅读,属于说明文,主要介绍了古代人如何利用结冰的路面运输巨石,告诉了我们古代人如何聪明地利用结冰的路面运输巨石到目的地.
解答 8.A.细节理解题.根据第二段最后一句Then,in the depth of winter,when temperatures reached around-4C,buckets of water were poured on to the dirt track,transforming it into an ice road.可知,人们在地上挖坑是为了在深冬季节,倒进水,让水结冰,从而建立起一条结冰的道路.故选A.
9.B.推理判断题.根据第三段第三句Ancient tests suggested the ice was made slippery with more water; this reduced the friction further and just 50 men could pulla sledge.可知,用更多的水可以使冰更滑,这样可以减少摩擦力,因此推断人们在结冰的道路上倒更多的水减少摩擦力.故选B.
10.A.推理判断题.根据最后一段的内容可知,人们认为巨石阵也是用类似的冰橇运输的,但是有许多坑的地面和相对温和的天气排除掉这样的做法.因此推断研究者认为巨石阵不太可能是在结冰的道路上运输过来的.故A选项正确.
11.D.写作目的题.纵观全文可知,第一段最后一句是文章的主题句,接下来的段落主要介绍古代人如何利用结冰的路面运输巨石,因此写作目的是告诉我们古代人如何聪明地利用结冰的路面运输巨石到目的地.
点评 本文是一篇科教类阅读,题目涉及多道细节理解题,推理判断题,写作目的题.做题时学生应仔细阅读原文,把握文章主要内容,联系文章上下文内容并结合所给选项含义,从中选出正确答案,一定要做到有理有据,切忌胡乱猜测.
-Yes.It was not yet 2o'clock I got there.( )
A. | that | B. | when | C. | until | D. | before |