心理学成为一门独立科学的标志是
A.笛卡尔提出“反射”概念
B.冯特1879年创立第一个心理学实验室
C.巴甫洛夫提出“两种信号系统”学说
D.斯金纳的操作性条件反射理论
参考答案:B
--- Don’t you think it necessary that he __________ to Miami but to New York?
--- I agree, but the problem is _______ he has refused to.
A.will not be sent; that
B.not be sent; that
C.shouldn’t be sent ; what
D.should not send; what
把少量下列物质分别放到水中,充分搅拌,可以得到溶液的是 [ ]
A.面粉
B.食盐
C.花生油
D.奶粉