箱形桥或框构桥是指桥跨为()刚性结构的桥。A、开放 B、闭合 C、联结 D、拼装 发布时间:2017-07-24 13:03 │ 来源:www.tikuol.com 题型:单项选择题 问题: 箱形桥或框构桥是指桥跨为()刚性结构的桥。A、开放B、闭合C、联结D、拼装
题型:单项选择题 — Is Lily good at singing? —Yes , she is.We often hear her_______ in the next room.A.singB.to singC.sangD.Sings 查看答案