Which of the following statements about a bamboo-copter is true? A. It runs on wind energy. B. It must be very big to carry a heavy body. C. If we use it to cross oceans, we can have troub
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Which of the following statements about a bamboo-copter is true?
It runs on wind energy.
It must be very big to carry a heavy body.
If we use it to cross oceans, we can have trouble.