题型:问答题 简答题 — These farmers have been to the United States. — Really? When ______ there? [ ]A. will they go B. did they go C. do they go D. have they gone 查看答案
题型:问答题 简答题 施工单位对列入建设工程概算的安全作业环境及安全施工措施所需费用,不能用于 ( )。A.安全防护用具的采购B.安全生产条件的改善C.安全施工措施的落实D.安全管理人员的加班补贴 查看答案