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According to Dr. Jin, if a woman suffers from urethritis, has blood in her urine, has taken hormone supplements, has just miscarried or has given birth for a few weeks, etc., she may also be tested with a pregnancy test stick, and the result may also be false positive, thus deceiving the doctor.这是一部温暖、有趣的概念冒险故事片，直面人生中关于生和死的大问题，迷失的太空中，一位友善的外星人，陪同着两个孩子在茫茫宇宙中找寻着······3. Use object instead of string to record the current state, which makes the state switching more clear at a glance.Seventh fire facilities maintenance and testing institutions shall meet the following conditions:We can see the above code; Player-to-player coupling code has been removed, However, all logical operations are put into the intermediary object for processing. Any operation of a certain player does not need to traverse to notify other players, but only needs to send a message to the intermediary. The intermediary processes the message after receiving it, and after processing the message, the processing result will be fed back to other player objects. The intermediary mode is used to remove the coupling code between objects. Make the program more flexible.