问题
名词解释
练习密度
答案
参考答案：
学生实际从事练习的时间与总课时的比例
搜题请搜索小程序“爱下问搜题”
练习密度
参考答案：
学生实际从事练习的时间与总课时的比例
| 阅读下列短文，给图片排序。 | ||||
| We sat on a big rock and wanted to drink some water. Then there was a big noise in the trees. Suddenly this big thing came out from the trees and walked to the river. It was very big but had a small head. It walked like a duck. We were afraid and sick. We ran to our house. Our mother and father put us to bed. They said, " You will be better in the morning ". But we will always remember this. Matt
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