问题详情

What"s the main idea of the passage？
A．Bird wings are more complex than airplane wings.
B．People design airplane by looking at the wing shapes of birds.
C．How can we make the airplane wings more efficient
D．The wings of birds and airplanes conform. to the same aerodynamic principles.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！