可视电话终端分别支持以下（）组网方式的接入A.网线 B.ISDN C.PSTN及3G

阅读下面短文，根据文章的内容选择最佳答案。

      American kids like to do volunteer (志愿的) jobs during the holidays. This summer, 86 children

 worked at a baseball stadium in Michigan, US.

     These children are between 10 and 14. They worked as runners to get food for the people.

     They made a little money by doing this. Sam Walsh is an 11-year-old student. During one game, he

 made $23. He learned to get things right. "Once I didn't get the right food. I got no tip," Walsh said.

     Taylor Winer, 14, became a volunteer five years ago. He learned a lot from the work. "I see what it is

 like to have a job. I learn to get to work on time and wear the right clothes for work," said Winer.

1. American kids like to do _____ jobs during the holidays.

    A. part-time

    B. volunteer

    C. full-time

2. The underlined word in the third paragraph means "_____".

    A. 顶部

    B. 建议

    C. 小费

3. Sam Walsh became a volunteer when he was _____.

    A. 9

    B. 14

    C. 11

4. Taylor Winer learned from this job that _____.

    a. it's not right to be late for work.  b. to dress well for work  c. how to get a job

   d. how to make moneye. what it's like to have a job

    A. a b c

    B. b c d

    C. a b e

“把一电铃固定在支座上，放在钟罩内，通电后发声．然后不断抽去罩内的空气，铃声渐渐减弱；若又向罩内充入空气时，铃声又渐渐增强．”你认为这段描写是否正确？说出你的理由．

炒菜时，加入一些料酒和食醋可使菜变得味香可口，其中的原因是（　　）

A．有盐类物质生成

B．有酯类物质生成

C．有醇类物质生成

D．有酸类物质生成

生活妆应用于（）。

马克思说：“市场总是在扩大，需求总是在增加，工场手工业再也不能满足这种需求，于是蒸汽和机器引起了工业中的革命”。这段话表明（）

A.蒸汽机的发明是工业革命开始的标志

B.工业革命的直接原因是蒸汽和机器的发明

C.由于市场需求的扩大，机器大生产取代了手工劳动

D.工场手工业一直无法满足市场的需要