试题与答案

办理《开锁业治安管理备案登记证》的同时也需要办理()。A、开锁服务工作证 B、营业执照

题型:单项选择题

题目:

办理《开锁业治安管理备案登记证》的同时也需要办理()。

A、开锁服务工作证

B、营业执照

C、身份证

D、户口本

答案:

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参考答案:第一步:粗提。纯化粗样快速浓缩(减少体积)和稳定样品(去除蛋白酶)最适用层析技术:离子交换/疏水层析第二步:中度纯化。去除大部分杂质最适用层析技术:离子交换/疏水层析第三步:精细纯化。达到...

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