矩形风管的长、宽分别为A、月,则其当量直径为( )。A.2AB/(A+ B.(A+ 发布时间:2017-06-24 09:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 矩形风管的长、宽分别为A、月,则其当量直径为( )。A.2AB/(A+B.(A+/2C.(A+/(2AD.(A+/(A
题型:单项选择题 —Have you heard Tom has got a promotion recently?—Yes, he was appointed ________ as a manager last month. 查看答案