在研究下列物体的运动时，能将物体作为质点处理的是
Thetheoryofblackholesinspace__(accept)bymanyseriousscientistsandastronomers.
InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.
Beinga________(high)motivatedlauguagelearner,hetakeseveryopportunitytoimprovehisEnglish
对中国学生而言，用英语思维比说英语更难。
