—Where did you come across your old classmate Jane?
—It was in the supermarket ________ she worked ________ I came across her.
A:where; when
B:that; when
C:that; that
D:where; that
如图是同种生物4个个体的细胞示意图,其中A对a为显性.B对b为显性,哪两个图示的生物杂交后,后代出现4种表现型、6种基因型( )
大运河沟通南北交通,连接淮河与长江的运河名称是( )