下列有关实验的表述，哪个选项的选择都是正确的（　　）

①在观察洋葱鳞片叶内表皮细胞的DNA和RNA分布时，盐酸的作用是对该细胞进行解离

②经健那绿染液处理的口腔上皮细胞中的线粒体依然保持生活状态

③用于观察质壁分离与复原的紫色洋葱表皮细胞同样可用来观察植物细胞有丝分裂

④探究温度对酶活性的影响实验中，使用过氧化氢酶往往不能达到预期实验结果

⑤孟德尔的豌豆杂交试验中将母本去雄的目的是防止自花受粉．

A：雀形鸟类所吃的谷物经过消化和吸收后形成的残渣，1、5小时就排出．绿头鸭吃进的食物，经过消化和吸收后0、5小时就排出．雀形鸟类一天所吃的食物相当于自身体重的20%﹣40%．蜂鸟一天所吃的食物相当于自身体重的2倍．体重1500克的雀鹰，能在一昼夜吃掉800﹣1000克肉．

B：如图是鸟类的呼吸系统示意图

阅读理解。根据短文内容，选择正确答案。

    A lot of boys and girls in west countries are wearing the same kinds of clothes: Many of them have long hair, so it is often difficult to tell whether they ate boys or girls.

    One day, an old man went for a walk in Washington. When he was tired he sat down on a long chair. A young person was standing onthe other side of the pool.

  “Good Heavens!” the old man said to the person who was sitting next to him on the chair. “Do you see that person with long hair? Is ita boy or a girl?”

  “A girl.” said his neighbor, “She's my daughter.”

  “Oh!” the old man said quickly, “I'm sorry. I didn’tknow that you were her mother.”

  “I'm not,” said his neighbor, “I'm her father.”