The invention of various____promotes the exploration of outer space.A.spacecrafts B.aircrafts C.spacecraft D.aircraft 请说明原因哦,

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Theinventionofvarious____promotestheexplorationofouterspace.A.spacecraftsB.aircraftsC.spacecraftD.ai

The invention of various____promotes the exploration of outer space.A.spacecrafts B.aircrafts C.spacecraft D.aircraft 请说明原因哦,
The invention of various____promotes the exploration of outer space.
A.spacecrafts B.aircrafts C.spacecraft D.aircraft
请说明原因哦,

The invention of various____promotes the exploration of outer space.A.spacecrafts B.aircrafts C.spacecraft D.aircraft 请说明原因哦,
答案应该是B
1.根据题意,什么可以提升外空的开发.aircraft是飞机,而spacecraf是宇宙飞船,所以可以排除BD.
2.然后判断名词的单复数,various 是各种各样的,所以后面的名词应该是复数名词,promote之所以变形是因为,invention是主语并且为单数,所以promote为单三形式

A.spacecrafts
各种空间飞船的发明推动了外空探索。