下图为某女孩家庭的性别遗传示意图,如果女孩的一条 X 染色体来自奶奶,另一条 X 染色体来自外公的可能性为( )
1 2
1 4
1 8
0
( )(3)你想别人介绍说着是你的弟弟Sam,可以说: A. This is my brother,Sam. B. He is Sam.
( )(2)下午老师上课时,会说: A. Good afternoon,Yang Ling. B. Good afternoon, class.
( )(1)当早晨你见到老师时,可以说: A.Good morning, Miss Li. B.Hello, Miss Li.
( )(5)She ________ my sister. A. is B.are
( )(4)This is ________. A. myB.me