知觉的恒常性
参考答案：当知觉条件在一定范围内改变时，知觉的映像保持相对稳定不变。
. There are three basic ways of _____ language to writing, and all known graphic systems use one or a combination of these.
A．committing
B．attaching
C．comparing
D．relating
常见的创业条件信息收集工具主要有？
