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【单选题】
《压力容器安全技术监察规程》中规定：压力容器中的介质为混合物质时，介质的组分并按《压力容器安全技术监察规程》毒性程度或易燃介质的划分原则，由（）提供介质毒性程度是否属于毒性或易燃介质的依据，无法提供依据时，按毒性危害程度或爆炸危险程度最高的介质确定。
A.
设计单位的工艺设计技术部门
B.
使用单位的生产技术部门
C.
压力容器检验单位
D.
设计单位的工艺设计或使用单位的生产技术部门
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A.
compounding
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A.
4 percent
B.
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C.
0．6 percent
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3．4 percent
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work on
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