科尔伯格认为,认知是发展的前提,即道德水平随着认知能力的发展而提高。()
参考答案:对
—Will you be able to come to the concert?
— ____. [ ]
A. I don't think so.
B. I don't expect
C. I am afraid I can't
D. What's your idea?
解方程:3(2x-1)2=2-4x.