The theory of black holes in space__ (accept) by many serious scientists and astronomers.
is accepted
暂无解析
Manyothernewtechniquesarenowavailablethatenablemoreresearch___(do)inthetesttubetoseeifchemicalsproduceharmfulbiologicaleffects.
Heblamedhispoorperformance_____jetlag
Expertshavefoundthatnormalsleepcanbedividedintofive______stages
InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.
Thefixedstarwasaplanet.（）
