多选题
A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in a thread-safe manner. Which two can support this design goal？（）
发布日期：2020-04-10
Store the data in a vocal variable.
Store the data in an instance variable.
Store the data in the HttpSession object.
Store the data in the ServletContext object.
Store the data in the ServletRequest object.
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