Do you stop to use the bathroom?

There is a toilet on the train.

Domestic bullet trains are generally equipped with toilets. Toilets are generally located at the end of each carriage, and some special carriages may not be equipped with toilets, such as dining cars. Ordinary cars have toilets. >>>More

The toilets and toilets on the train are all connected to the outside of the train, and there must be air leaks.

Yes, you can go to the toilet in the national examination, not to mention the postgraduate entrance examination. It's just that there will be a teacher following you. But it's definitely okay to go to the toilet, but I don't know if you can finish it after going to the toilet! >>>More

If it's a large one, it should be there, whether it's a long distance or a short distance, but if it's a simple and small one, there shouldn't be one.

Train, the means of human transportation. In 1804, the world's first steam locomotive was built by the British mine technician De Ivesk using Watt's steam engine, with a speed of 5 to 6 kilometers per hour. Because coal or firewood was used as fuel, people called it "train", and it is still used today. >>>More