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NYLON ……… IN 1930S.A. INVENTED B. IS INVENTED C. W...
NYLON ……… IN 1930S.A. INVENTED B. IS INVENTED C. WAS INVENTED D. HA...
20 DE THI HSG ANH 9
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6. Nylon ……… in 1930s.a. invented b. is invented c. was invented d. has been invented
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20 DE THI HSG ANH 9