花岗岩是一种（　）                 

草履虫依靠下列哪种结构运动（     ）

假定你是李华，“全国中学生英语演讲大赛”将在你校举行，请你根据以下要点，以校学生会的名义写一则通知：

1）．主题：未来生活；

2）．时间和地点：2016年5月18日上午8：30-12：00；体育馆；

3）．选手：全国各地的20名高中生；

4）．评委：中国和美国的英语教授；

5）．要求：欢迎参与，积极交流。

注意：

1）．词数100左右；

2）．可以适当增加细节，以使行文连贯；

3）．开头已为你写好。

阅读理解，根据材料内容选择最佳答案。
    The Macintosh family is in England. Mr. Macintosh is a farmer(农场主). He has three people help him on the farm. They help him look after the animals(照顾动物). Mrs. Macintosh is a teacher. She teaches math. She can play the piano and the guitar. Mr. and Mrs. Macintosh have one son and one daughter. Their son's name is Tom and their daughter's name is Fiona. Tom and Fiona like music very much. Tom can play the guitar and his sister, Fiona, can play the piano. Tom and Fiona go to the school music club every Wednesday. Next month they will play for all the teachers and students in their school. Mrs. Macintosh is very happy for them. Mr. Macintosh can't play the guitar or the piano but he can sing. Sometimes, the family plays and sings together(在一起) after dinner in the evening. That's Mr. Macintosh's favorite family activity(活动).

某研究人员为了探究冰和水的体积与温度的关系，在一定的环境下将1g的冰加热，分别记录其温度和体积，得到了如图所示的图像。请你观察此图像回答下列问题：