请解释下为啥选b c

请解释下为啥选b c 122为啥选c.详细解释 初中化学实验操作判断,请重点解释下B.C, 只解释下B选项为啥不对就行 请着重解释下C ____the lecture began.A.After we took our seats B.After we have sat down C.Having been seated D.Having sat down解释下为啥选A b 请重点解释下选C…谢谢 I can't remember how many days ago --- a fight broke out between them.A it was when B it was that C was it when D was it that 选B 请解释为啥不能选A 为啥选c.b错哪里. c项为啥不对选D 解释下这两项 I will always stand by you whatever ____ come,if I _____ say.A.will; can B.should; can C.can; 谁能解释下我听,我不动为啥选DD.may，may 地理第五题,求解释为啥选b, 选择题第6题求解释为啥选B 初中数学题,选b还是c?解释下 必修二生物.请解释下为什么b c d是错的. Which one goes ____, the car, the train or the plane? A. fast B. the fastest C. fastest D. the most答案选c,对吗?请解释下 这道题选不对的 选B.只解释下D为啥对就行?D是怎么分析出来的?麻烦说清楚点 若C为锐角,为什么a平方+b平方-c平方＞0.请解释下原因.