Create and then update work items via csv importer/exporter

Hi all.
I want to achieve the following scenario which creates and then updates (to set parent link) work items.
1. import a csv file and create new work items
2. export work items imported at step 1 into the csv file
3. modify the csv file to set parent link
4. import the csv file and update work items

My question is how to achieve step 2.
Can I export work items that imported at step 1 without using a query?

I may do the above process many times and create work items have the same work item type, attributes as already created, so may not be able to query just now imported work items.

After importing successfully, imported work items are displayed in the 'work item' view. Ideally, I want to export them from the view, but I couldn't.

Does anybody have any idea?

Thanks in advance.