白合金焊的特点是A.以银为主要成分B.熔点为183℃C.只能用于银合金的焊接D.流动 发布时间:2018-01-02 17:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: 白合金焊的特点是A.以银为主要成分B.熔点为183℃C.只能用于银合金的焊接D.流动性较差E.焊媒为正磷酸
题型:单项选择题 There _________ a meeting tomorrow afternoon.A.will beB.hasC.is going to haveD.will have 查看答案
题型:单项选择题 The police ___ him of stealing a car and put him into prison.A.warnedB.chargedC.accusedD.threatened 查看答案