题目

阅读短文，根据括号中的汉语意思填入单词，使短文意思完整、通顺。每空一词。 The idea for the book Harry Potter and the Philosopher's Stone c_____86_______to Joanne Kathleen Rowling in 1990. It took her seven years to finish writing it. D_____87_____those seven years she had a number of jobs. One of them was t______88______ English in PortugalRowling sent the book to four publishers (出版商) before one of them bought it. She was very happy to sell her book because it was her d____89______ to become a writer. Beforeshe sold her book, Rowling was living 20世纪20年代，丹麦和英国的一些化学家提出了新的酸碱理论--质子论．质子论认为：凡能放出质子（即H+）的分子或离子都是酸，凡能结合质子的分子或离子都是碱．根据这个理论，试判断：（1）H2SO4，（2）OH-，（3）HCO3-（4）NO3-，（5）Na+中属于酸的是     ，属于碱的是     ．