根据如图所示某牙膏商标上的部分文字，用化学用语填空：

（1）图中一种金属元素的符号　____ ；

（2）n个硝酸根离子的符号____ ；

（3）碳酸钙高温分解反应的化学方程式　____ 　．

生物圈包括____ 的底部，____ 大部，____ 的表面。

阅读下面的短文，判断文后的句子是否符合短文内容。符合的写“T”，不符合的写“F”，短文未涉及的写“N”。

   Pablo Picasso was born in Spain in 1881. His father was an artist and also anart teacher. He gave little Picasso the first lesson in drawing. The boy showed great interest in it and learned it very quickly. Picasso drew so well that he won a prize — “Science and Charity” for his first important painting at the age of 15. Later he studied in several cities in Spain. But no one could teach him because he had known so much.
   When he was 19, he visited Paris. At that time, Paris was the center of the world for artists. Everything in the painting world was new to Picasso. When he was 23, he moved to Paris to live and spent the rest of his life in France.
   In his 80s, Pablo Picasso still worked like a young man. He kept on looking for new ideas and new ways to work. He never stopped painting all his life.
Pablo Picasso, one of the greatest artists in the world, died in 1973.
____ Pablo Picasso was born in Spain.
____ Pablo Picasso won a prize of “Science and Art” at the age of 15.
____ Pablo Picasso was the only son of his parents.
____ Pablo Picasso lived in France for 91 years.