It is the____of____today. My family are going to visit____. Uncle Li____my father. He is____for us at the airport. Now we are in the taxi to my relative's house. My brother is a____boy, so he is sitting between my mother and father. We are____very happy.

对一定质量的某种气体，在某一状态变化过程中压强p与热力学温度T的关系如图所示，则描述压强p与摄氏温度t的关系图象中正确的是（   ）

眼球里具有感光细胞的结构是（ ）

甲图和乙图显示植物的两种生殖方式，下列有关叙述正确的是（  ）