名词解释：二手车服务

题型：阅读理解

Which is the most popular song in the world now? Yes, it’s South Korean star PSY’s “Gangnam style” video. The video has become the most liked video on YouTube.

In fact, breaking records, the video has set the Guinness (吉尼斯) World Record for the most 'liked' video in YouTube history. Gangnam Style, that was available for viewing on July 15, has more than 2,479,030 likes on YouTube. What’s catching the eyes in Gangnam style is PSY’s special dance moves, funny horse riding scenes and dancing in a towel（毛巾）. Even as many may not understand the language, the video has become the talk of the Internet.

The video also has many different versions（版本） on the Internet now. The song has been the top one on the song lists in 31 countries, including the United States, United Kingdom, and Canada. “The YouTube video never wanted to attract foreign countries. It was for local fans,” PSY told the reporters after a concert. “My goal in this music video was to look not so fashionable until the end. I achieved it. ”

The singer’s stage name is from “psycho”, and he writes and produces his own music. “Gangnam style” is about the lifestyle of the young people in Seoul, the Capital of South Korea.

小题1:Who sang the song “Gangnam Style” first?

A．YouTube.

B．PSY.

C．Guinness.

D．We don’t know.小题2:YouTube is probably a ___________.

A．magazine

B．newspaper

C．shop

D．website小题3:So many people are interested in PSY’s special dance moves. It looks like___________.

A．duck walking

B．fish swimming

C．horse riding

D．bird flying小题4:The song won the first place on the song lists in ___________ countries.

A．about thirty

B．three

C．fifteen

D．millions of小题5:Which of the following is TRUE according to the passage?

A．PSY is the singer’s real name.

B．PSY sings songs written by others.

C．The song of “Gangnam style” appeared in mid-July.

D．“Gangnam Style” describes the lifestyle of the old people in Seoul.

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题型：选择题

下述实验不能达到预期实验目的是（　　）

序号	实验内容	实验目的
A	将2.5g CuSO₄•5H₂O溶解在97.5g 水中	配制质量分数为1.6%的CuSO₄溶液
B	向盛有1mL硝酸银溶液的试管中滴加NaCl溶液，至不再有沉淀生成，再向其中滴加Na₂S溶液	说明一种沉淀能转化为另一种溶解度更小的沉淀
C	室温下，用pH试纸测定浓度为0.1mol•L^-1NaClO溶液和0.1mol•L^-1CH₃COONa溶液的pH	比较HClO和CH₃COOH的酸性强弱
D	室温下，分别向2支试管中加入相同体积、相同浓度的Na₂S₂O₃溶液，再分别加入相同体积不同浓度的稀硫酸	研究浓度对反应速率的影响