non profit startup Central bankers' tasks are limited to keeping inflation stable and independence easier to maintain. Given this narrow mandate, the allocation of central bank decisions is limited. Moreover, it is easier to explain how the central bank's policy tools are linked to its political mandate. Following the "mad" foreign policy, for example, Mr Trump could go to war with north Korea or Iran. Or he could publish more inflammatory tweets about Islam's wickedness, which would allow individuals to be disrupted and marginalised into the arms of the islamic state (Isis) or other extremist groups. That would increase the likelihood of attacks on Isis, such as the "lone Wolf" in the United States, boasting or driving trucks in its own pedestrian area. There are a dozen people, and if not hundreds of people, the slain trump can wrap himself in the flag and say, "I told you so." If things get bad, trump and his generals can declare a state of emergency, suspend civil liberties and transform the United States into a truly populist state of Pluto. According to the latest standard GB/T 3730.1-2001, cars are mainly divided into passenger cars and commercial vehicles. 1. Ordinary transport vehicles Cylinder work volume refers to the volume of gas swept by the piston from the top to the bottom, also known as single cylinder displacement, depending on the cylinder diameter and the piston stroke. Engine displacement is the total volume of working volume of each cylinder, usually expressed in milliliter (CC). Engine displacement is one of the most important structural parameters. It is more representative of engine size than cylinder diameter and cylinder number, and many indicators of engine are closely related to displacement.