对于上级公安机关的重要部署及执行有重大社会影响的任务，要在党委的密切领导下进行。 ( )
参考答案：对
概念划分的基本规则？
A client who agreed to become an organ donor is pronounced dead. What is the most important factor in selecting a transplant recipient（）
A. Blood relationship.
B. Sex and size.
C. Compatible blood and tissue types.
D. Need.
