Over2,200yearsago,Chengduwasthreatenedbyfrequentfloods....
问题详情:
Over 2,200 years ago, Chengdu was threatened by frequent floods. Li Bing, together with his son, decided to construct an irrigation system on the Minjiang River____41____ (prevent) flooding. ___42___having a long study and a lot of hard work by the local people, the great Dujiangyan Irrigation System was completed. Since then, the Chengdu Plain ___43___ (be) free of flooding and the people have been living peacefully and wealthily.
It is the___44___ (old) and only surviving no-dam irrigation system in the world. It is also ___45___ wonder in the development of Chinese science. The project consists of three important parts,namely Yuzui, Feishayan and Baopingkou, which were ___46___(science) designed to control the water flow of the rivers throughout the year.
There is a glorious bridge called the Anlan Cable Bridge crossing the Minjiang River above Yuzui, ___47___ you can clearly see the entire system. The great ___48___ (construct) originally started before the Song Dynasty. At that time, the body of the bridge was constructed with wooden blocks and the handrails(扶手)were made of bamboo. Recently the wood and bamboo have been replaced with steel and concrete to guarantee the security of ___49___(visit) from home and abroad. Seen from afar, the bridge looks like a rainbow ___50___(hang) over the river.
【回答】
41. to prevent ...
42. After 43. has been
44. oldest 45. a
46. scientifically
47. where 48. construction
49. visitors
50. hanging
知识点:语法填空
题型:未分类
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问题详情:下列与实验相关的叙述正确的是 A.稀释浓硫*时,应将蒸馏水沿烧杯内壁缓慢地注入浓硫*中B.配制溶液时,若加水超过容量瓶刻度,应用胶头滴管将多余溶液吸出C.配制1mol·L-1300mLNaCl溶液可以选择一个50mL的容量瓶和一个250mL的容量瓶D.可以用右图装置进行*气的...
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设复数(是虚数单位),则复数的虚部为( )A. B. C. ...
问题详情:设复数(是虚数单位),则复数的虚部为( )A. B. C. D.【回答】B知识点:数系的扩充与复数的引入题型:选择题...
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问题详情:(1)观察下图,请将下列国家的英文字母代号填入答题卡图中对应的方框内。早期殖*家:A.葡萄牙 B.英国(2)仔细观察该图,据图指出奴隶贸易的主要集运地的分布特点。【回答】 (1)上框B,下框A。(2)主要分布在非洲西海岸和东海岸。知识点:血腥的资本积累题型:综合题...
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一个质量为4kg的物体静止在足够大的光滑水平地面上.从t=0开始,物体受到一个大小和方向周期*变化的水平力F作...
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