【单选题】What's the relationship between 'John’s uncle bought a new car yesterday' and 'John has an uncle'?
【多选题】异丙肾上腺素与肾上腺素比较,具有以下特点
【简答题】What has John Nash discovered in the end? ________________________________________________________________________________________
【多选题】异丙肾上腺素与肾上腺素相比,前者的特点是: