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题库 / GMATAdvanced-SC-12
Since the 1930s aircraft manufacturers have tried to build airplanes with frictionless wings, shaped so smoothly and perfectly that the air passing over them would not become turbulent.
wings, shaped so smoothly and perfectly
wings, wings so smooth and so perfectly shaped
wings that are shaped so smooth and perfect
wings, shaped in such a smooth and perfect manner
wings, wings having been shaped smoothly and perfectly so
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A. wings are shaped smoothly这一点很奇怪，机翼光滑的形状？明显不符合逻辑。按照逻辑，应该是光滑的机翼和其完美的形状使流经机翼的空气变得不turbulent。A错误。
B. smooth 和 perfectly shaped 都修饰wings，B正确。
C. smooth（可能为副词）和perfect应为副词
D. 错误同A。
E. 错误同A。
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