英语18.To reach the top of the building ,you have to climb 18 _______ of _______.18.To reach the top of the building ,you have to climb 18 _______ of _______.a.flight;stairs b.flights;stairs c.flight;stair d.flights;stair为什么
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![英语18.To reach the top of the building ,you have to climb 18 _______ of _______.18.To reach the top of the building ,you have to climb 18 _______ of _______.a.flight;stairs b.flights;stairs c.flight;stair d.flights;stair为什么](/uploads/image/z/7498146-66-6.jpg?t=%E8%8B%B1%E8%AF%AD18.To+reach+the+top+of+the+building+%2Cyou+have+to+climb+18+_______+of+_______.18.To+reach+the+top+of+the+building+%2Cyou+have+to+climb+18+_______+of+_______.a.flight%3Bstairs+b.flights%3Bstairs+c.flight%3Bstair+d.flights%3Bstair%E4%B8%BA%E4%BB%80%E4%B9%88)
英语18.To reach the top of the building ,you have to climb 18 _______ of _______.18.To reach the top of the building ,you have to climb 18 _______ of _______.a.flight;stairs b.flights;stairs c.flight;stair d.flights;stair为什么
英语18.To reach the top of the building ,you have to climb 18 _______ of _______.
18.To reach the top of the building ,you have to climb 18 _______ of _______.
a.flight;stairs b.flights;stairs c.flight;stair d.flights;stair
为什么
英语18.To reach the top of the building ,you have to climb 18 _______ of _______.18.To reach the top of the building ,you have to climb 18 _______ of _______.a.flight;stairs b.flights;stairs c.flight;stair d.flights;stair为什么
d.flights;stair
flight表示一段楼梯,是可数名词。stair是一阶楼梯,也是可数名词。所以选b
选B,好像是习惯用法,在正规的英文字典和外国网站上都有一样的例句,前后都是复数
B,18段FLIGHTS,而每个FLIGHTS有很多STAIRS