一根原长10cm的弹簧,挂上5N的钩码时弹簧长度变为12cm,当这根弹簧改挂上1 发布时间:2017-06-19 00:10 │ 来源:www.tikuol.com 题型:选择题 问题: 一根原长10cm的弹簧,挂上5N的钩码时弹簧长度变为12cm,当这根弹簧改挂上15N的钩码时仍在弹性限度内,弹簧长度变为 A.4cmB.8cmC.12cmD.16cm
题型:选择题 Take care of the boy and the dog ______ are crossing the street. A. which B. who C. that D. whom 查看答案