单双哪个几率大

简介：Note: Why must sailors know how to swim? Firstly, Yuezhou is full of small boats. The navigation is bumpy and unstable, and it is easy to fall into the water. If you don't know how to swim, you will definitely die if you fall into the water. Secondly, if you don't know how to swim, you will not be able to stand firmly on the boat, whether it is shooting bird cannons or throwing fire pots. It is difficult to complete it smoothly, and it may even cause casualties to one's own side.