核动力厂退役所产生的废物量相当于其运行所产生的废物量的总和,而极低放废物所占的比例要占核动力厂退役废物量的()%。
A. 40-65
B. 50-75
C. 60-85
D. 70-95
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With damaged floating vessels,the most important consideration is the preservation of ().
A. Bilge pumping capacity
B. Reserve buoyancy
C. Level attitude
D. Instability
跨装车组应使用车钩缓冲停止器,安装应在车钩()下进行。
A. 自然状态
B. 拉伸状态
C. 压缩状态
D. 静止状态
马传染性贫血的临床特征为()
A. 发热
B. 贫血
C. 黄疽
D. 消瘦
E. 以上都是
The point that is halfway between the forward and after perpendicular and is a reference point for vessel construction is the ().
A. Half length
B. Mid-body
Center line
D. Amidships