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【单选题】
Choose the statements from the box and place them in the proper place in the essay. 选择合适的句子完成段落。A.
Building a good human tower takes team work and skills.
B.
Within seconds I assisted in the formation of a three- level tower.
C.
Each team is famous for its tallest and most complex tower of people.
D.
Once a tower is built, try and see if the group can hold it for a count of 30.
E.
Since then it’s been popular, with groups competing to build higher structures.
F.
Before long I was called forward and given the great honor of the President’s Belt.
G.
I hoped to change my position because I knew that this activity required particular skills.
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【简答题】根据测量的试样原始尺寸,计算原始横截面积,至少保留 位有效数字。
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