【判断题】硅酸盐水泥熟料的矿物成分中,对强度贡献最大的是C 3 A。( )
【判断题】Cervantes is recognized as the father of the modern European novel and has had great impact on world literature. His masterpiece Don Quixote was a parody satirizing a very popular type of literature a...
【判断题】硅酸盐水泥熟料的矿物成分中,对强度贡献最大的是C 3 S。( )
【判断题】水泥四种矿物成分中,C2S发热量最大,生产中热硅酸盐水泥时,要加以限量。()
【单选题】按伺服系统的控制方式分类,数控机床的步进在测量过程中,不会有累积误差,电源切断后信息不会丢失的检测元件是()。
【单选题】His return from abroad will have great impact on the political world.
【判断题】运输包装上的标志是指运输标志,也就是通常所说的唛头。( )
【判断题】The large number of failures among EC companies in recent years provides proof that electronic commerce is a passing fad which will have little long-term impact on world business.