The technology of building upwards existed in the
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The technology of building upwards existed in the early 19th century.
A.Right
B.Wrong
C.Not mentioned
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答案:C
由文章第三段第一句话" The technology existed to this as early as the 1 9th century.”可知,早在19世纪建造高楼的技术己经存在。但是并没有提到是在19世纪早期。故选C。
