三. What are the characteristics of transformed cells? (Choose all of the following that apply.)(25 分)
A. Stable growth pattern
B. Restricted growth in soft agar
C. Polyploidy
D. Lack of contact inhibition
E. Anchorage-dependent growth
F. Accurate cell cycle control
G. Changes in membrane structure and function
H. Tumor formation in nude mice
I. Growth in soft agar
J. Reduced serum requirements