装置采用的集中分散控制系统通常简称为（）。A、DCS B、UPS C、PLC D、E

保荐机构制作的投资价值研究报告应对影响发行价格的因素进行全面、客观的分析。研究报告应至少包括（）。

A.发行人的行业分类、在行业中的地位及其对定价的影响

B.发行人与同行业上市公司股票一级市场定价的比较

C.发行人盈利能力和财务状况对定价的影响

D.发行人募集资金投资项目对股票定价的影响

.

The first MP4 player was born years ago. Soon many music fans were wondering how fantastic it is! If you have been into technology enough, perhaps you may have a knowledge of the MP4. If not, you do need to know something before buying one, even if you are familiar with MP3. MP3 is the CD-like disc with greater capacity. How about MP4? This small digital product will really enrich the joy from listening to music. You can even feel the “touch” of music to your soul!

Now, some similar digital products advertised as “MP4 players” are simply MP3 players, which do not play video and MPEG format (格式) and also lack other particular functions. These products confuse some buyers, as they may think the “MP4” players simply mean they can do more than MP3.

What is MP4?!

It is a multimedia container. It is not only used to store digital audio (音频) and digital video streams, especially those of MPEG, but can also be used to store other data such as subtitles (字幕) and pictures. As a most modern container format, it allows streaming over the Internet.

With the help of a piece of MP4 video equipment, you can change various programs such as MPEG to MP4, ASX to MP4, AVI to MP4 and so on, which can be done very quickly and easily without any effect on the sound quality. By installing (安装) DVD-MP4 software, you can transfer particular music from a DVD to an MP4 video file. It really excites your listening music experience. 

Then, there is MP4 advanced and you can set your own collection of all the programs — TV shows, games, and music. You can even see movies which are still running in cinemas. What else digital product could you possibly ask for? 

57. It is suggested here that you should ________ before buying an MP4 player

A. first be a music fan                                 B. have a knowledge of MP4

C. get familiar with MP3                                  D. buy a CD-like disc

58. From the passage, we can see that MP4 is ________ MP3. 

A. much bigger than              B. just as advanced as  

C. not so particular as              D. more functional than

59. Which function of MP4 is NOT directly mentioned in this passage?

A. Storing digital audio and video streams.    B. Recording some movies in cinemas.

C. Playing TV shows, games and movies.      D. Transferring particular music from a DVD.

60. From the last sentence, it’s clear that the writer tries to tell us it is _______.

A. reasonable to buy other digital products    B. impossible to buy something else

C. a very wise choice to buy an MP4       D. an exciting experience to buy an MP3  

进出口食品标签审核适用于对进出口固定包装食品标签审核、检验管理。( )

下列对基底型偏头痛描述错误的是（）

A.先兆症状明显源自脑干和（或）两侧大脑半球

B.可出现运动无力先兆症状

C.可见构音障碍、眩晕、耳鸣、听力减退先兆症状

D.视觉先兆症状常累及双眼

E.常伴恶心、呕吐

以下（）物品属于第五类危险品。

A.汽车

B.化学氧气发生器

C.杀虫剂

D.胶粘剂