判断题
所有工作于同温热源与同温冷源之间的一切热机，以可逆热机的热效率为最高。
正确
多项选择题 放射性衰变的类型有（）。
判断题 The Late Middle Ages are often described as a period of crisis and decline。（）
判断题 During the Renaissance, many Italian scholars began to learn Greek because they wanted to translate Latin works into Greek。（）
