线路大、中修后,无垫层的碎石道床,枕下清砟厚度不得小于()。A.200mm B.3 发布时间:2017-07-08 13:31 │ 来源:www.tikuol.com 题型:单项选择题 问题: 线路大、中修后,无垫层的碎石道床,枕下清砟厚度不得小于()。A.200mm B.300mm C.350mm D.400mm
题型:单项选择题 根据句意及图画提示填写单词。 1.There is a bowl_____on the table. 2. There are four_____in the basket.3.How much is the_____?4.The_____(不能修改)is on sale. 5.Can you buy a_____for me? 查看答案