Select all of the things are done to boats, cars, and planes in order to reduce friction. The surface is polished. The body is streamlined. Special rivets are added. They are built with sleek, tapering

Select all of the things are done to boats, cars, and planes in order to reduce friction.

The surface is polished.
The body is streamlined.
Special rivets are added.
They are built with sleek, tapering lines.

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Select all of the things are done to boats, cars, and planes in order to reduce friction. The surface is polished. The body is streamlined. Special rivets are added. They are bu…

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