学生原有的知识水平或者发展心理水平对新的学习的适应性为______。
参考答案：学习准备
—Look at the wall. There are some pictures ______ it.
—And there are two windows ______ it. [ ]
A. on; on
B. in; on
C. on; in
D. in; in
社会主义社会的基本矛盾
