2. 外语
  3. "...these are cities concerned with the past" in the first paragraph refer to cities that The difficulty in constructing tall b

"...these are cities concerned with the past" in the first paragraph refer to cities that The difficulty in constructing tall b

admin2009-06-15  100
问题 "...these are cities concerned with the past" in the first paragraph refer to cities that
The difficulty in constructing tall buildings in the 19th century lies in
选项 A、the shortage of money.
B、the lack of a device to carry people upward.
C、backward technology.
D、mountains taking up land space.
答案B
解析 本题答案的依据在第三段。文中说早在19世纪建造高楼的技术已经存在，限制楼高的因素只有一个，那就是人们下班回家后不想像爬山那样去爬楼梯，说明当时还没有找到把人往高处送的办法。
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