答案：【解析】：本题是阅读理解题，需要阅读关于自传科学家阿尔伯特·爱因斯坦的文章，并根据文章内容判断句子的真假或未提及。我们需要先理解文章的内容和语境，再逐一判断每个句子的真假。
1.第一个句子“Einstein said his first word at age five.”与原文中“Einstein didn’t start speaking until he was about three years old, and he didn’t speak in full sentences until he was five.”存在出入，原文只说他直到三岁才开始说话，五岁才能说出完整的句子，并未说他五岁才说第一个词，所以此句为错误。
2.第二个句子“Teachers noticed Einstein’s talents early on.”与原文“At school, many teachers couldn’t see his talents...”相矛盾，原文明确表示许多老师没有看出他的才能，所以此句为错误。
3.第三个句子“Einstein’s uncle was a talented scientist.”在原文中没有提及，原文只说他的叔叔给他数学题解，没有说他叔叔是科学家，所以此句为未提及。
4.第四个句子“Einstein performed scientific experiments by himself.”与原文“As Einstein grew older, he continued to learn on his own. He performed his own scientific experiments and explored new ideas.”相符，所以此句为正确。
5.第五个句子“Einstein’s interest in learning lasted for his whole life.”与原文“Throughout his life, his love of learning helped him become one of the most influential scientists in history.”相符，所以此句为正确。
【答案】：1.F
2.F
3.NM
4.T
5.T