Have the contact of 6 months , but the result of the examination can be electronegative , how be to return a responsibility 有6个月的接触，但是检查的结果会是阴性，是怎么回事？
2.
Distinguish above all so bacterium of cause of disease is bacterium of positive of change orchid family name or electronegative bacterium , choosing antibiotic respect meaning great 所以首先区分病原菌是革兰氏阳性菌还是阴性菌，在选择抗生素方面意义重大。
3.
Liver of my mom second 6 assay among them " of antibody of surface of virus of " second liver and " of antibody of core of virus of " second liver are two electropositive , other 4 are electronegative , my mom this year 38 years old , how can tell to issue this result 我妈妈乙肝六项化验其中"乙肝病毒表面抗体"以及"乙肝病毒核心抗体"两项是阳性,其他四项是阴性,我妈妈今年38岁,谁能告诉下这个结果怎么样
