問答題
Who designed the first helicopter (直升飛機)? Who () the most famous pictures in the world? Who knew more about the human body than most () ? There is an answer () all these questions --- Leonardo de Vinc
Who designed the first helicopter (直升飛機)? Who () the most famous pictures in the world? Who knew more about the human body than most () ? There is an answer () all these questions --- Leonardo de Vinc
