生产经营单位发生生产安全事故后,事故现场有关人员应当立即报告()。
【单选题】
施工缝处继续浇筑混凝土时,已浇筑的混凝土抗压强度不小于()MPa。
A.
1.0
B.
1.2
C.
1.5
D.
2.0
参考答案
参考解析
【单选题】
Ever since the world began nations have difficulty in keeping peace with their neighbors.
Ever since
began
have difficulty
keeping