广泛应用于钢筋纵向连接及预应力钢筋与螺丝端杆焊接的是( )。A.闪光对焊 B.电弧 发布时间:2017-06-05 18:38 │ 来源:www.tikuol.com 题型:单项选择题 问题: 广泛应用于钢筋纵向连接及预应力钢筋与螺丝端杆焊接的是( )。A.闪光对焊B.电弧焊C.电阻点焊D.电渣压力焊
题型:单项选择题 将下列句子变为否定句。1. I have lunch at school. I ______ ______ lunch at school. 2. We watch TV in the evening. We ______ ______ TV in the evening. 3. They play football after school. They ______ ______ football after school. 4. Lucy and Lily like music. Lucy and Lily ______ ______ music. 查看答案