在遗传学实验中，F₁与隐性类型测交，后代表现型的种类及比例应为(　　)

据记载：贝多芬的《英雄交响曲》原本是献给拿破仑的，当拿破仑称帝并背离法国大革命理想时，贝多芬把题目改成“为纪念一位伟人而作”。这体现出贝多芬（   ）

判断下列句子与短文内容是否相符。

    Hi．I'm an English girl．I'm Jane．I'm 143 cm tall and 42 kg．I studied in Shanghai last year．I had many Chinese friends．My best friend is Liu Ying．She is 161 cm tall and 51 kg．Last weekend we went to a park．We went shopping，then we saw a film．We were very happy．I love my friends．