普通单开道岔辙叉部分轨距,直、侧向均为()。
A.1435mm
B.1440mm
C.1450mm
D.1445mm
参考答案:A
The Canadian friends from our school have given us a lot of books, few of ________ a bit difficult for us Chinese students.
A. them are
B. that is
C. which are
D. which is
下列关于大陆架的说法错误的是()
A.大陆架不属于沿海国的领土
B.沿海国有权勘探大陆架和开发其自然资源
C.大陆架属于沿海国管辖范围之内的海底区域
D.国家对大陆架及其资源、上覆水域享有主权