TheUnitedStatesisacountry_(advance)inscienceandtechnology
advanced
暂无解析
Heis______absorbedinhisownthoughtsthatheseemsunawareofwhat'sgoingonintheroom
Decisionmakersmusthavesomewayofdeterminingofseveralalternativesisbest.（）
Thereisanincreasing_(tend)forwomentohavechildrenlaterinlife
InAugust1977,asatellitetogatherdataaboutthe10millionblackholeswhicharethoughttobeintheMilkyWay.
Ourmost________(success)productisbasedonaverysimpleidea
