项目所用砂石料可以由三级公司实行区域集中采购。
参考答案：对
--------I wonder why Tom was ________ from the post.
--------Don’t you know he can’t ________ that kind of work?
A．moved; match
B．removed; be equal to
C．moved; be suitable for
D．removed; suit
（）补强时，须盖过腐蚀边缘50mm以上。
A.裂纹
B.破损
C.腐蚀
