题干
the kind driver, the old man was saved by the doctors.
A：Thanks for
B：Thanks to
C：Thanks you for
D：Thanks
答案(点此获取答案解析）
B
the kind driver, the old man was saved by the doctors.
A：Thanks for
B：Thanks to
C：Thanks you for
D：Thanks
中有机物的分子式排列规律，判断空格中有机物的同分异构体数目是（ ）
