题目

已知成等差数列，成等比数列，则等于（    ） （A）               （B）             （C）             （D）或 答案：B   因为成等差数列，所以.又成等比数列，所以（舍去），，所以阅读短文，判断对“T”错“F”。I’m Amy. I have a new schoolbag. It’s black and white. It looks like a panda. It’s big. The yellow one is mine ,too. It’s too small for me . What’s in my schoolbag? A pencil-box and some books .But not all the books are mine .I’m new here. The storybooks are Zhang Peng’s .This English book is his ,too. Lucy and Lily are twin sisters. The science book and Chinese book are theirs.( )1. Amy has a new schoolbag.( )2. There are some CDs in Amy’s schoolbag .( )3. The science book is Amy’s.( )4. Lucy and Lily are twin sisters.( )5. The science book and Chinese book are Zhang Peng’s .