志愿者绩效评估的目的有()。
TheSalkvaccineisamajorfactorinthefighttoeradicatepolio.
Theyaretryingtomakesurethat5Gterminals_________by2022fortheBeijingWinerOlympics.
Themusicianalongwithhisbandmembers___________tenperformancesinthelastthreemonths.
Solidgeometryhasenabledastronomerstocalculatethepositionsoftheheavenlybodiesrelativetooneanother.
