英语就画线部分提问The first aeroplane flew at 48 kilometers per hour.(at 48 kilometers per hour划线) 急

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英语就画线部分提问Thefirstaeroplaneflewat48kilometersperhour.(at48kilometersperhour划线)急英语就画线部分提问Thefirstaerop

英语就画线部分提问The first aeroplane flew at 48 kilometers per hour.(at 48 kilometers per hour划线) 急
英语就画线部分提问
The first aeroplane flew at 48 kilometers per hour.(at 48 kilometers per hour划线) 急

英语就画线部分提问The first aeroplane flew at 48 kilometers per hour.(at 48 kilometers per hour划线) 急
How fast did the first aeroplane fly?