A、目标公众
B、优先公众
C、内部公众
D、外部公众

A．体重明显减轻
B．水肿或腹水
C．血清白蛋白<30g/L
D．血浆转铁蛋白低于２.0g
E．前白蛋白0.18g/L

A．typedef struct student{
int num;
int age;
}STD;
STD st1;
B．struct student{
int num ,age;
}st1;
C．struct{
  int num;
float age;
}st1;
D．struct student{
  int num;
int age;
};
student st1;