正确答案: A

学生的认识规律

题目：提出直观性教学原则的主要依据是

解析：A

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举一反三的答案和解析：

[单选题]Passage ThreeFor more than six million American children, coming home after school means coming home to an empty house. They spend part of each day alone. They are called "latchkey children". They're children who look after themselves while their parents work. And their bad conditions have become a social problem.

suffer problems from being left alone

解析：

41．答案为D  根据文章第1段第5句They spend part of each day alone及全文内容可推知钥匙儿童指经常独自在家的孩子。

[单选题]我国社会主义经济建设必须始终坚持以（ ）

经济效益为中心

[单选题]称赞教师为“人类灵魂的工程师”的教育家是( )

加里宁