The swimming styles known as（ ）were invented by Australians.
A.the breaststroke and the butterfly stroke B.the backstroke and the breaststroke C.the crawl and the butterfly stroke D.the crawl and the backstroke正确答案C
The swimming styles known as（ ）were invented by Australians.
A.the breaststroke and the butterfly stroke B.the backstroke and the breaststroke C.the crawl and the butterfly stroke D.the crawl and the backstroke正确答案C
