题目

Food is a hot issue in China. Eating, 41         (consider) to be an important part of each day, is far beyond simply meeting a need;42         now, people sometimes hardly have time to enjoy their food, because they are living in a fast-paced society. They need fast food. That’s 43         China’s fast-food market expands. The first foreign fast-food restaurant to arrive in China was called KFC, quickly followed by Pizza Hut, McDonald’ s and so on. With the 44         (develop) of China, foreign fast-food chains are realizing high-speed growth i下列关于科学家探究“DNA是遗传物质”实验的叙述，正确的是A．用含标记的噬菌体侵染细菌，子代噬菌体中也有标记 B．分别给两组小鼠注射R型活细菌、加热杀死的S型细菌，小鼠均不死亡 C．用含标记的噬菌体侵染细菌，离心后上清液中具有较强的放射性 D．艾弗里等肺炎双球菌转化实验、赫尔希与蔡斯噬菌体侵染细菌实验的技术相同