打印的分类方法有许多种，按工作原理可分为哪两大类（） A.击打式 B.热敏式 C.非

阅读理解。

     I went home one Saturday afternoon in the autumn of 1993 to get some work done in the garden. While

sweeping leaves on the ground, my five-year-old son Nick came over and asked me to write something on

a piece of paper to make a sign for him.

     "What for?" I asked.

     "I'm going to sell some of my stones," he answered.

     Nick was fascinated with stones and had collected many stones from all over.

     "I'm too busy to do that for you. Go and ask your mum for help," I said.

     A short time later, Nick, returned with a sign, reading, "Stones, One Dollar Each". He took the sign, a

small chair and 4 of his best stones and walked to the road in front of our garden. There he put the stones

in a line and sat down on the chair.

     After half an hour, nobody passed by. I walked to him and asked him to go back, but he didn't.

     Another half hour later, a small car came down the road. I watched as Nick stood up, holding his sign up.

A woman rolled down a window and read the sign. I couldn't hear their talk, but I saw the woman turn to the

driver and the man reach for his pocket.

     I sat in the yard, as Nick ran to me. Waving the dollar, he shouted, "I told you I could sell one stone for

a dollar-if you believe in yourself, you can do anything."

1. Why didn't the writer help his son?

A. Because his wife is better at making a sign.

B. Because he didn't know what to write.

C. Because he was busy sweeping leaves.

D. Because he didn't want his son to sell the stones.

2. The underlined words "was fascinated with" mean ______.

A. was far from

B. was afraid of

C. was famous for

D. was interested in

3. Nick was a boy _____.

A. who was kind

B. who had a strong mind

C. who was honest

D. who had many hobbies

4. Which is the best title (题目) of the story?

A. My son's first sale.

B. Let's collect stones.

C. How to sell a stone.

D. A hobby that can make you rich.

5. From the passage we know _____.

A. the story happened in spring

B. the car was driven by a woman

C. Nick spent half an hour selling one stone

D. the writer might be moved (感动) by his son

由四舍五入法得到的近似数2.10万，它是精确到______位．

抗震救灾，重建家园. 为了修建在地震中受损的一条公路，若由甲工程队单独修建需3个月完成，每月耗资12万元；若由乙工程队单独修建需6个月完成，每月耗资5万元．

（1）请问甲、乙两工程队合作修建需几个月完成？共耗资多少万元？

（2）若要求最迟4个月完成修建任务．请你设计一种方案，既保证按时完成任务，又最大限度节省资金.（时间按整月计算）

Millie lives on            floor in a tall building. [ ]

A. five

B. fifth

C. the fifth

D. the five

道德认识是对_____及其_____的认识。