图1为消化系统图，图2为食物通过消化道时，淀粉、蛋白质和脂肪被消化过程中数量的变化图，请分析回答以下问题：

阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

    Are you looking for something fun? Would you like to help other people in your spare time? Then join us and be a volunteer!

    We are a non-profit organization(非盈利性组织). We have volunteer jobs for people of all ages. Anyone, from twelve-year-old children to people in their 80s, can become a volunteer.

    You can help people in many ways. Schools need help with taking care of children while parents are working. Hospitals need volunteers to look after children while their parents see a doctor. Animal lovers can help take care of those dogs and cats without homes. There is something for everyone.

    "As a volunteer, I don't want to get anything. Seeing the children's happy faces, I am happy, too." said Carlos Domingo, an old woman of 62.

    "I often played computer games in my spare time before. Now I help older people learn how to use computers." said another volunteer at the age of 18.

    If everyone helps out a bit, we'll all have a better world to live in.

    Interested? Call us on 1-800-555-5756. Or visit our website: www. active. Com.

____

读太阳光照局部图（如图），其中阴影部分表示黑夜，回答下题．

①∃x₀∈R，ln（x₀²+1）＜0；

②∀x＞2，x²＞2^x；

③∀α，β∈R，sin（α﹣β）=sin α﹣sin β；

④若q是￢p成立的必要不充分条件，则￢q是p成立的充分不必要条件．

其中真命题的个数为（   ）