RFLP限制性片段长度多态性
家庭生命周期包括（）。 ["A.家庭形成期 ","B.家庭成长期 ","C.家庭成熟期 ","D.家庭衰老期"]
“苏北计划”志愿者每年可享受多少日的探亲假（）？ ["5日","10日","15日","20日"]
各类旅游交通形式对旅游开发有什么意义？
The interactionalist’s position is that language develops as a result of the complex（）between the uniquely human characteristics of the child and the environment in which the child develops.
简述艺术欣赏与艺术批评的区别。
