某种细菌在培养过程中，每半小时分裂1次，每次一分为二．若这种

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问题选择题

某种细菌在培养过程中，每半小时分裂1次，每次一分为二．若这种细菌由1个分裂到16个，那么这个过程要经过[ ]

A．1.5小时

B．2小时

C．3小时

D．4小时

答案

答案：B

阅读理解

阅读下列短文，将人名及其身份填在图画的相应方框内

This is my family. My grandpa's name is Harry Brown. My grandma's name is Jean Brown. My

father's name is Jeff Brown. My mother's name is Helen Brown. Jeff and Helen are my parents.

I have a sister. Her name is Kate Brown. My name is Tom Brown.Iam ten. My sister is eight.

按上图回答下列问题

1. How old is Tom Brown?

________________________________________________

2. Is that girl his sister?

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3. Is Helen Brown his grandmother?

________________________________________________

4. What’s his grandmother’s name?

________________________________________________

5. Is Jeff Brown his brother?

________________________________________________

名词解释

形象性