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知县虽小，也是父母官。(2) Problem Orientation:Javascript neither supports abstract classes nor has the concept of interfaces. Therefore, be very careful when using the state mode. If you forget to implement the buttonWasPressed method for a state subclass when writing a state subclass, an exception will be thrown when the state switches. Because Context always delegates requests to the buttonWasPressed method of the state object. Therefore, let the abstract method of the abstract parent class throw an exception directly, which will be found at least during the program run.9-1? Restaurant: Create a class named Restaurant whose method __init__ () sets two properties: restaurant_name and cuisine_type. Create a method named describe_restaurant (), where the former prints the above two messages, and a method named open_restaurant (), where the latter prints a message indicating that the restaurant is open.至少再也不用担心被人算计，到头来却一无所知，而且还能依靠这等时间差的优势，给敌人以沉痛的打击。Note: Here is the script of the react debugging tool. Don't consider it.ALTER DATABASE SSDB SET SINGLE_USER