判断题 无论过程可逆与否，闭口绝热系统的膨胀功总是等于初、终态内能差。

判断题 Similar to all ancient agricultural societies, ancient Egyptians also divided a year into four seasons。（）

判断题 Although people from different regions in the Roman Empire spoke different mother tongues, they could always communicate with strangers either in Latin or in Greek, the official languages of the Empire。（）