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1.blue whales can weigh as much as 150 cars.2 it weighs as m

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1.blue whales can weigh as much as 150 cars.2 it weighs as much as 40 cars.为什么1句 can 2句不用
为什么第1句用 can 而第2句不用 can 有什么区别?第1句不用 can
1.blue whales can weigh as much as 150 cars.2 it weighs as m
2句话的意思分别是:蓝鲸可重达150辆小汽车(的重量);它重达40辆小汽车(的重量).can在这里是可以能够的意思,最大重量可以达到,而“它”现在重量是确定的,不能用"can"