从生物技术的原理分析，下列设想中无法实现的是

Different countries have different food, such as French fries, Italian pizza and so on. In China, fast food is becoming more and more popular these days. For example, McDonald's and KFC. Why do Chinese people like fast food so much? There are many reasons. First, it is quick. It takes little time. Second, it is easy to carry. Third, people like the restaurant's relaxing environment and American style. Though it tastes good, fast food generally contains little nutrition (营养). If you want to have a healthy body, do not go to fast food restaurants too often. Eat more fruit and vegetables.

无论m为任何实数，二次函数y=x²+（2-m）x+m的图象总过的点是（　)

明代地理学家徐霞客，立志走遍祖国名山大川，边防要塞。研究中国地理30余年，他不避风雨，不怕虎狼，不计程期，不求伴侣，风餐露宿，忍耐饥寒，多次死里逃生，雄心壮志不动摇。为了寻求长江源流，他在51岁时登上旅途。先后克服重病、粮绝、遇盗等困难，历时4年，终于完成考察，确认金沙江是长江的源流，纠正了当时人们以岷江或嘉陵江作为长江上源的错误认识。