after world war 2 ,technological___ in various fields have been madea.advances b.progresses c.drawbacks d.disadvantages

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after world war 2 ,technological___ in various fields have been madea.advances b.progresses c.drawbacks d.disadvantages
after world war 2 ,technological___ in various fields have been made
a.advances b.progresses c.drawbacks d.disadvantages

after world war 2 ,technological___ in various fields have been madea.advances b.progresses c.drawbacks d.disadvantages
选b