“重点检重点修”的检查范围和质量标准规定：提速铁路货车侧架立柱磨耗板、斜楔及主摩擦板无破损、（）、丢失。
参考答案：窜出
A．Because they have some financial problems.
B．Because there will be much rain in May.
C．Because they won’t have free time in May.
D．Because they can’t have everything got ready by then.
模板中相邻两块板的高低差允许值为______mm。
A．1
B．2
C．2.5
D．3
