下列属于细胞液癌基因的是() A.Ras B.Fms C.Myb D.Myc E.A 发布时间:2017-05-05 15:33 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列属于细胞液癌基因的是()A.RasB.FmsC.MybD.MycE.Abl
题型:单项选择题 Not only his parents but also his elder brother _____ to the Summer Palace. They haven’t been back yet.[ ]A. have beenB. have goneC.has goneD. has been 查看答案