Scientists have d_____ that this disease is carried by mice.

问题描述:

Scientists have d_____ that this disease is carried by mice.

discoverd discover: [ dis'kʌvə ] v. 发现Examples:1. She discovered the joy of writing. 她感到了写作的乐趣.2. Columbus is said to have discovered America in 1492. 据说哥伦布于1492年...