制备不溶性骨架片()。 A.硅橡胶  B.聚乳酸  C.巴西棕榈蜡  D.卡波姆

题型:单项选择题

问题:

制备不溶性骨架片()。

A.硅橡胶 

B.聚乳酸 

C.巴西棕榈蜡 

D.卡波姆 

E.HPMC

考点:西药执业药师药学专业知识(二)西药执业药师药学专业知识(二)
题型:单项选择题

3G是指第三代数字通信技术,它以手机语音功能之外的无线上网、手机电视等数据功能为特色。按3G标准生产的手机问世后,人们可以手机宽带上网、视频通话、网络游戏、移动电邮、移动搜索、传输音像、网络电视等。这说明 [ ]

A.人们可以根据自己的需要创造新的联系  

B.必须创造规律促使现有事物的变化发展

C.新事物对旧事物的否定是肯定中有否定  

D.人们可以创造一定条件建立多样性联系

题型:单项选择题

在常温下,皮肤的物理散热速度主要决定于

A.皮肤温度

B.环境温度

C.环境湿度

D.皮肤和环境温度差

E.风速

题型:单项选择题

Third-generation mobile phones, known as 3G, are the next big step for the telecom industry. Data speed in 3G networks is much quicker than that in present technology. This means users can have high-speed Internet access and enjoy video and CD-quality music on their phones.

"Mobile data is not a dream; it’s not an option but a requirement," said Len Lauer, head of a US communications company, Sprint PCS, at a 3G conference in Bangkok earlier this month.

With 3G, you can forget about text messages telling you yesterday’s news; a 3G phone can receive video news programs, updated four times a day. Internet access will also be much quicker, making it easier to surf the Web on your phone than on your computer at home.

Don’t worry about getting lost. 3G phones offer map services so you can find a new restaurant just by pressing a few keys on your handset.

However, the most impressive part of 3G technology is video calling. With live two-way video communication, you can have face-to-face talks with friends and family on your mobile phone.

Many European countries have already launched the service. In May 2000 the US Government issued five license to run 3G wireless services, while the first 3G phones arrived in Italy in March this year.

International telecom companies can’t wait to sell 3G in China, the world’s largest mobile telecommunications market. But they will have to be patient. At the moment, China is busy testing its 3G-based technologies, networks and services. This will be followed by a trial period before the phones can finally hit the shops.

"We need to create a pool of 3G customers before the large-scale commercial launch of the service," said Fan Yunjun, marketing manager for Beijing Mobile. "We expect that the 3G licenses will be issued late next year.

Third-generation mobile phones (3G mobile phones)
(1)
  • a. Data speed: (2) than present technology
  • b. Video and (3) music
  • c. Video news programs: (4) four times a day
  • d. Internet access: quicker and (5)
Impressive

functions

a. Offer (6) services, helping you find your wayb. Provide two-way video (7)
3G phones in Chinaa. China is busy (8) its 3G-based technologies, networks and services.b. 3G phones should go through a (9) period before being put into market.c. 3G phones are expected to be seen (10) next year.

第(6)空应填()

题型:单项选择题

若CD盘片上锁存储的立体声高保真数字音乐的带宽为20~20000Hz,采样频率为44.1Hz,量化精度为16位,双声道,1小时的数据量大概是()

A、360MB

B、720MB

C、512MB

D、635MB

题型:单项选择题

()阐述了迁移量与学习刺激、反应之间的数量关系。

A.奥斯古德的三维迁移模式

B.认知结构迁移理论

C.产生式迁移理论

D.学习定势说

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