手轮式的开启机构是由首轮、螺杆组成的，开启后能重复使用. 发布时间：2019-02-15 19:47 │ 来源：www.tikuol.com 题型：判断题 问题： 手轮式的开启机构是由首轮、螺杆组成的，开启后能重复使用.
题型：判断题 读一读，判断正(√)误(×)。( ) 1. She is dancing. ( ) 2. Mother Bear is cooking dinner.( ) 3. Lucy is drawing a picture.( ) 4. Lisa is washing clothes.( ) 5. Ben is reading books. 查看答案
She is dancing. 
Mother Bear is cooking dinner.
Lucy is drawing a picture.
Lisa is washing clothes.
Ben is reading books.