【单选题】( )3.-Hi,My name is John.We haven't met before,have we? -No, we haven't.
B.
Let's meet each other.
【判断题】在平面任意力系中,若其力多边形自行封闭,则该任意力系的主矢为0.
【单选题】Hi. Haven't we _______ before?
A.
Yes. I believe we have.
【判断题】在任意力系中,若其力多边形自行封闭,则该任意力系的主矢为零。
【单选题】听力原文:M: Hi. Uh, haven't we met before? You look so familiar. W: Yeah. We met on campus last week, Yeah! And you asked me the same question. M: Oh, oh really? I'm sorry, but I'm terrible with names. Bu...
【判断题】在任意力系中,若其力多边形自行封闭,则该任意力系的主矢为零。
【单选题】听力原文:M: Hi. Uh, haven't we met before? You look so familiar. W: Yeah. We met on campus last week, and you asked me the same question. M: Oh, oh really? I'm sorry, but I'm terrible with names. But, but...
【判断题】3-17 在任意力系中,若其力多边形自行封闭,则该任意力系的主矢为零。
【单选题】加强作风建设,必须紧紧围绕( ),增强群众观念和群众感情,不断厚植党执政的群众基础。
【判断题】在任意力系中,若力多边形自行封闭,则该任意力系主矢为零。