题目

将抗原A和抗原A、B先后注射到同一小鼠体内，得到的抗体含量曲线如右图所示（分别用曲线A和曲线B表示)。该曲线图表明： A．小鼠对抗原A更敏感 B．抗原A的破坏性更大 C．第二次免疫反应比初次反应更强 D．小鼠对抗原B反应较慢   答案：C根据句意，在答题卡标有题号的横线上，写出括号内所给单词的适当形式。【小题1】Wang Xi did best in the writing________________(竞赛).【小题2】French is one of the most beautiful _______________(语言) in the world.【小题3】All the people ______________(喝彩) when Bach said thanks to China at the closing ceremony of  Nanjing Youth Olympics.【小题4】Tomorrow, my father is going to ___________(出席) an important meeting in Nanjing.