Duplet. Har biri 30 soniyadan muhokama qilinadigan ikkita savol. 1. German Lukomnikovning nostandart asarida (iqtibos): «UNGA 30». UNI ayting. 2. German Lukomnikovning nostandart asarida (iqtibos): «UNGA 60». UNI ayting.