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[单选题]
运装货车函553号文件规定:非荧光磁悬液浓度为()
A.1.0mL/100mL~2.5mL/100mL
B.1.2mL/100mL~2.5mL/100mL
C.1.3mL/100mL~2.5mL/100mL
D.1.4mL/100mL~2.5mL/100mL
查看答案
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A.1.0mL/100mL~2.5mL/100mL
B.1.2mL/100mL~2.5mL/100mL
C.1.3mL/100mL~2.5mL/100mL
D.1.4mL/100mL~2.5mL/100mL
A.将磁悬液搅拌后,经过一定时间后仍有部分磁粉末沉淀下来的磁悬液被认为是性能不良的
B.磁悬液中的磁粉量是取一定量的磁悬液倒入沉淀管,按磁粉的沉淀容积求出的
C.当磁悬液的浓度低于规定值时,应将磁悬液倒去
D.荧光磁粉磁悬液的规定浓度一般比非荧光磁粉磁悬液的规定值高