Contact us
Choose a category below so we can get back to you as quickly as possible.
因為,火車65-15秒時間內前進的距離為990米, 所以,火車的速度是990÷(65-15)= 19.8米/秒, 可得:火車的全長是19.8×15 = 297米.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.