客运专线预制梁成品的终张拉(或放张)后30d的梁体上拱度允许值为()。A、〒L/50 发布时间:2020-01-20 13:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 客运专线预制梁成品的终张拉(或放张)后30d的梁体上拱度允许值为()。A、〒L/5000B、〒L/1500C、〒L/3000
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题型:单项选择题 I can think of many cases ________ students obviously knew a lot of English words and expressions but couldn't write a good essay. [ ]A. why B. whichC. as D. where 查看答案