一、我们需要证明有人说:“周围环境温度越低,人的寿命就越长.”恐怕有不少人不相信.如果能拿出足够的证据,证明这个结论是正确的,才会有说服力.看来证明一个结论是必要的.图1也有人说,数学中有些定理是显而易见的,不需要证明.如定理“内错角相等,两直线平行”,由图1可以看出, First, we need to prove that someone says: “The lower the ambient temperature, the longer people’s lives will be.” I am afraid that many people do not believe. If we can produce enough evidence to prove that this conclusion is correct, we will be convinced. Force. It seems to prove that a conclusion is necessary. Figure 1 is also said that some of the theorems in mathematics are obvious and do not need to be proved. If the theorem “equal misalignment, two lines are parallel” can be seen from Figure 1.