2. 外语
  3. Engineers use the principles of aerodynamics in designing airplanes and other objects affected by aerodynamic forces.

Engineers use the principles of aerodynamics in designing airplanes and other objects affected by aerodynamic forces.

admin2012-07-29  40
问题 Engineers use the principles of aerodynamics in designing airplanes and other objects affected by aerodynamic forces.
选项 A、laws
B、movements
C、studies
D、products
答案A
解析 原则，原理
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