放射性固体废物的压缩减容需注意()问题。
A. 在压缩过程会释放出存在于废物货包中的气体，可能导致气溶胶污染，因此需要对排风作适当的净化处理
B. 吸收或附着在固体废物中的液体在压实过程中会被挤压出来，应该用适当捕集器收集，收集之后要作适当处理
C. 压缩中放废物需要有屏蔽措施或遥控操作
D. 压缩α废物必须在气密室中进行
E. 被压缩物的化学活性压缩之后并不消失，而且可能提高，自燃或爆炸性物质必须在预处理步骤分拣出来，压缩机房要设置消防灭火设施
F. 坚硬的不可压缩物混在一起进行压缩可能会损坏压缩机，应该在预处理步骤中分拣出来
奥氏体钢焊接工艺不合理或选材不当最容易产生（）
A. 热裂纹
B. 冷裂纹
C. 延迟裂纹
D. 未熔合
Between the steam dram and the smaller water dram below, large numbers of smaller diameter
A. fire
B. water wall
C. generating
D. down comer
Which of the following statements represents the advantage of rotary pumps as compared to
A. The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump
B. Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight
C. Rotary pumps occupy only one-half the space of reciprocating pumps
D. Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
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