题型：语法填空（语篇） 题类：模拟题 难易度：困难
山西省太原市第五中学2019届高三下学期英语4月阶段性检测试卷
While not everyone will have pondered (思索) the subject while staring out of the window during flight, the question as to why aeroplanes have circular windows rather than square ones is interesting.
Over the years, aerospace engineering (make) huge leaps in aeroplane technology, meaning planes can carry passengers and go faster. The planes have also changed shape to increase safety — including the windows.
In the 1950s, jetliners were starting to become mainstream, the De Havilland Comet came fashion. With a pressurised cabin, it was able to go higher and faster than other aircraft.
, the plane had square windows and in 1953 two planes fell apart in the air, (kill) 56 people in total.
The reason for the (crash)? The windows.
there's a corner, there's a weak spot. Windows, having four corners, have four potential weak spots, making them likely to crash under stress — such as air pressure.
By curving the window, the stress that would (eventual) crack the window corner is distributed and the likelihood of it breaking is reduced.
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