Psychology may be defined as the science that studies the behavior of man and other animals. In this definition, ‘the science’ is ____________.

A、断乳过渡
B、饲料配方过渡
C、饲喂次数过渡
D、猪舍过渡

A、printf("%d");
B、printf("%%d");
C、printf("/%d");
D、printf("%%%d");

A、奖赏
B、反馈
C、表扬
D、放松