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The feudal system developed during the Zhou dynasty.
Kate was a presumptious person she always thought her girl friend would be there
They showed that a writing system developed during the Shang Dynasty.
By the wage system
The metric system.
The total mass during a chemical process in a closed system remain constant.
The principle of passing information from one place to another.
the sun.
The principles of good tax system is that it is efficient, understandable and equitable. The benefit principle is also another principle of a good tax system.
Doppler effect is the basic principle for the radar.
Bernoulli's principle. The above answer is wrong. Its Pascal's Principle :)
the diaphragm
Pascal's principle is the foundation of modern hydraulics
it works on the principle of direct injection system of petrol engine
nothing
Authentication
It is valid