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  3. According to the text, who is "France’s magician of iron"? How did Eiffel make the iron belt running from pillar to pillar perf

According to the text, who is "France’s magician of iron"? How did Eiffel make the iron belt running from pillar to pillar perf

admin2012-09-10  60
问题 According to the text, who is "France’s magician of iron"?
How did Eiffel make the iron belt running from pillar to pillar perfectly horizontal?
选项 A、He made a careful plan.
B、He used hair to test whether the tower is tilting.
C、He embedded water jack in the column.
D、He deployed creeper cranes.
答案C
解析 本题有关建塔技术，说铁塔第一个平台的一条桁架必须保持水平，否则将引起塔身倾斜。Eiffel的解决办法是把水压千斤顶嵌到重440吨的主柱里边去，这样可以调整出一个完美的角度。故选C。
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