Một sợi dây dài 28m, được cắt thành hai đoạn. Đoạn thứ nhất dài gấp 3 lần đoạn thứ hai. Hỏi mỗi đoạn dài bao nhiêu mét?
1. If there are too many flying cars, will there be traffic jams in the sky?
2. Which means of transport will be inconvenient in bad weather?
3. Which means of transport will make you disappear then you reappear in
another place seconds later?
4. May future means of transport use a lot of fuel
5. Which car doesn't need a driver to take you to somewhere?