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简述制备固体分散体常用的载体。

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制备固体分散体常用的水溶性载体有聚乙二醇类（PEG）、聚维酮类（PVP）、表面活性剂类等；水不溶性载体有乙基纤维素、含季胺基团的聚丙烯酸树脂类、脂质类（胆固醇、β—谷甾醇、棕榈醇甘油酯、巴西棕榈蜡及蓖麻油蜡）等；肠溶性载体有纤维素类（醋酸纤维素酞酸酯、羟丙甲纤维素酞酸酯、羟甲乙纤维素）、聚丙烯酸树脂类等。

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如何理解教育原理的理论功能？
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What are the challenges facing multinationals that want to build their brands in China —I think the first thing is ignorance. There’s a huge (1) of the complexity in China, which is more complex than Europe. There are different rules of law, which (2) a significant factor. There are different (3) , Cantonese and Mandarin and lots of others in (4) , and dialects like Sichuan versions. You have problems of distribution. (5) Chinese brands have been (6) local because of the size of the market and the transportation system, What’s (7) built up there is a sort of a pride in localness.
How can companies build their brands in China —China is a place where (8) have to be very patient and you’ve got to build (9) time. You can’t go in (10) invest short-term and then pull out (11) then try to get back in (12) . It’s about being consistent, steady, building (13) reputation, building confidence and then rewards will (14) . It’s a consistent ability to anticipate need. It’s insightfulness that helps brands to (15) ahead.
How are local Chinese brands doing against the multinationals —China’s been built (16) local brands and there are a billion of them and they are (17) spending sums of money locally that really dominate the (18) . But the future is Chinese brands moving outside of (19) and marketing globally, because China’s got to move from a commodity economy to a (20) sophisticated economy, which fundamentally (21) brands. There isn’t a major economy in the world that (22) based upon producing great brands, because they provide far better margins and more sustainable (23) .
Has Asia produced any truly global brands —Japan has. Some of the major companies (24) do really very well with brands. In Korea, some of them (25) but some of them need to catch up in terms of understanding how to really build global brands.
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