【简答题】当R≥300m时,新建、改建及线路大修时,轨距加宽().
【单选题】要得到字符串中字符的个数,可以使用( )函数
【单选题】In my opinion, ___ matters is not one’s looks, but one’s inner thoughts.
【判断题】自觉和选择利用分工理论回归了马克思经济理论非常基础的理论命题上。()
【单选题】Which is Lucy's bag, the yellow one ______ the red one?
【判断题】复曲线应在正矢递减范围内,从较大轨距加宽向较小轨距加宽均匀递减。()
【单选题】—Which shirt is _______, the red one or the yellow one? —The yellow one, of course. It's only 20 dollars. [ ]