看世界歷史練聽(tīng)力：NO.24驚世發(fā)現(xiàn)—DNA雙螺旋結(jié)構(gòu)

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練習(xí)方式：填空&句子聽(tīng)寫

Feb 28th, 1953, in Britain, scientists James Watson and Francis Crick discover the double helix structure of DNA, the (1)___ of life. Years later, Crick describes his achievement. “Biological systems are the result of (2)___ , and may produce very complicated things, now the reason of DNA (look) looks so beautiful and simple, it goes right back to near the origins of life.”

1993, a deadly gun battle erupts shot the Branch Davidian compound in Waco, Texas, start a 51-day (3)___ between David Koresh's group and federal authorities.

(4) Sentence Dictation:__________________________________________.

句子聽(tīng)寫提示： Wisconsin: 威斯康星

And 1983, rock group U2 releases its “WAR” album, among the (5)___ "New Year's Day" and "Sunday Bloody Sunday".