[简答题]

 (1)Developments in two materials--iron and concrete--formed the technological basis for much modern architecture. In 1779 English architect Thomas Pritchard designed the first structure built entirely of cast iron: Ironbridge, a bridge over the River Severn in England. At around the same time, another Englishman experimented with a compound of lime, clay, sand, and iron slag (矿渣) to produce concrete. Iron had been used since ancient time to tie building elements together, but after the construction of Ironbridge it took on a new role as a primary structural material. (2)Builders throughout Europe and North America began to set up houses with beams of iron instead of wood.
(3)One of the most spectacular examples of early iron construction was the Crystal Palace in London, England. Spreading over 18 acres, the building consisted entirely of screens of glass set within iron frames. Paxton adapted two major features of the architecture of the Crysta

(1)Developments in two materials--iron and concrete--formed the technological basis for much modern architecture. In 1779 English architect Thomas Pritchard designed the first structure built entirely of cast iron: Ironbridge, a bridge over the River Severn in England. At around the same time, another Englishman experimented with a compound of lime, clay, sand, and iron slag (矿渣) to produce concrete. Iron had been used since ancient time to tie building elements together, but after the construction of Ironbridge it took on a new role as a primary structural material. (2)Builders throughout Europe and North America began to set up houses with beams of iron instead of wood.
(3)One of the most spectacular examples of early iron construction was the Crystal Palace in London, England. Spreading over 18 acres, the building consisted entirely of screens of glass set within iron frames. Paxton adapted two major features of the architecture of the Crystal Pala

(71)Developments in two materials--iron and concrete--formed the technological basis for much modern architecture. In 1779 English architect Thomas Pritchard designed the first structure built entirely of cast iron: Ironbridge, a bridge over the River Severn in England. At around the same time, another Englishman experimented with a compound of lime, clay, sand, and iron slag (矿渣) to produce concrete. Iron had been used since ancient time to tie building elements together, but after the construction of Ironbridge it took on a new role as a primary structural material. (72)Builders throughout Europe and North America began to set up houses with beams of iron instead of wood.
(73)One of the most spectacular examples of early iron construction was the Crystal Palace in London, England. Spreading over 18 acres, the building consisted entirely of screens of glass set within iron frames. Paxton adapted two major features of the architecture of the Crystal P

 Two or three times a week, she had a customer in (21) she began to take an interest. He was a middle-aged man (22) spectacles and a brown beard. He spoke English with a strong German accent. His clothes were worn and wrinkled, but he looked neat and had very good manners. He always bought two (23) of stale bread. He never asked for anything (24) stale bread; it cost a lot less than (25) bread. Once Miss Albert noticed a red and brown stain on his finger. She was sure that he was an artist and very poor. No doubt he lived in an attic, where he (26) pictures and ate stale bread and thought of good things to eat in the bakery. Often when Miss Albert sat down to her evening meal, she (27) sigh and wish the artist might share her food instead of eating his dry bread. One day the customer came in (28) usual and asked for his stale bread. As the sudden noise of the fire engine made him hurry to the door, Miss Albert (29) <
A. but
B. although
C. while
D. however