题目

假说一演绎法是现代科学研究中常用的方法，包括“提出问题、作出假设、验证假设、得出结论”四个基本环节．利用该方法，孟德尔发现了两个遗传规律．下列关于孟德尔研究过程的分析正确的是（）       A．  提出问题是建立在豌豆纯合亲本杂交和F1自交遗传实验的基础上       B．  孟德尔所作假设的核心内容是“生物体能产生数量相等的雌雄配子”       C．  为了验证作出的假设是否正确，孟德尔设计并完成了正、反交实验       D． Read and write. (阅读短文并填表)      My friend Linda is from New York, the United States. She can speak English and Spanish. She often collects stamps. She sometimes sends emails to me, and she never plays computer games. Linda's friend Tom is a Canadian boy. He likes doing art projects. He can speak a lot of Russian, and his first language is English. He often plays computer games. Sometimes he plays badminton. But he never plays football. Name Where from? Often do Never do Language collects stamps English/Spanish Tom Canada