22004除以7的余数是（） A．1 B．2 C．5 D．6

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问题选择题

2²⁰⁰⁴除以7的余数是（　　）

A．1

B．2

C．5

D．6

答案

2²⁰⁰⁴=8⁶⁶⁸=（7+1）⁶⁶⁸

=C₆₆₈⁰7⁶⁶⁸+C₆₆₈¹7⁶⁶⁷+…+C₆₆₈⁶⁶⁷7+C₆₆₈⁶⁶⁸

=C₆₆₈⁰7⁶⁶⁸+C₆₆₈¹7⁶⁶⁷+…+C₆₆₈⁶⁶⁷7+1

前面各项均能被7整除，只剩最后一项1不能被7整除，

∴2²⁰⁰⁴除以7的余数是1．

故选：A．

填空题

词汇。

1. Jay Chou plays the ______ (钢琴)well.

2. The old woman’s ______ (丈夫)is ill. She is looking after him.

3. Her ______ (发音) is really natural and correct.

4. He didn’t last ______ (考试). He felt very sad.

5. Don’t worry. ______ is ready.

6. I learned about Chinese ______ (节日).

7. We will study a new _____(学科) in this term.

8. There are thirteen _____(蜡烛) on the birthday cake.

9. It’s autumn. It’s the ______ (收获) season.

10. The ______ goes round the earth(地球).

单项选择题 A1/A2型题

儿科护理工作的中心是（）

A.儿童及其家庭

B.患儿家属

C.患儿

D.心理卫生

E.疾病