【判断题】机械无级自动变速器的传动比可以在一定范围内连续变化。
【简答题】()化原则使物流设备能发挥最大的效能,并使物流系统整体效益最优
【单选题】В 1851 г. было открыто движение по первой железной дороге __________.
A.
от Петербурга до Москвы
B.
от Владивостока до Москвы
C.
от Петербурга до Новосибирска
D.
от Владивостока до Петербурга
【单选题】She has been saving money in the past two years, so she is ___ that in the coming summer she will be able to afford a journey abroad.
【简答题】She has been saving money in the past two years, so she is ______ that in the coming summer she will be able to afford a journey abroad.A. confident
【判断题】全预应力混凝土梁从施工开始,到正常使用,直至承载能力极限状态,混凝土均不会产生弯曲裂缝。( )
【简答题】She has been saving money in the post tow year, so she is ________ that in the coming summer she will be able to afford a journey abroad.