搜题请搜索小程序“爱下问搜题”
问题 单项选择题 B型题

聚乙烯（）

A.控释膜材料

B.骨架材料

C.压敏胶

D.背衬材料

E.保护膜材料以下物质各用于哪种材料

答案

参考答案：E

解析：经皮给药制剂的常用材料分为控释膜材料、骨架材料、压敏胶、背衬材料、药库材料、和保护材料。骨架材料常用一些天然与合成的高分子材料，如亲水性聚乙烯醇和疏水性聚硅氧烷。常用的压敏胶有聚丙烯酸酯、聚异丁烯、和聚硅氧烷三类。控释膜材料常用乙烯-醋酸乙烯共聚物。保护膜材料常用聚乙烯、聚碳酸酯、聚四氟乙烯等塑料簿膜。

填空题

烘烤的定色期，若烟叶水分大时，湿球温度要控制在（）的水平
查看答案
填空题


A good translator is by definition bilingual. The opposite is not (1) true, however. A born and bred bilingual will still need two (2) to become a translator: first, the skills and experience necessary for (3) ; second, knowledge of the field in which he or she will (4) . The skills and experience for translation include the ability to write (5) in the target language, the ability to read and understand the (6) language material thoroughly, and the ability to work with the latest (7) and communication hardware and software.
Does a born and bred bilingual (8) a better translator than someone who learned language B later in (9) There is no definite answer, but the following issues are important. (10) , a born and bred bilingual often suffers from not truly knowing (11) language well enough to translate, with some even suffering from what (12) known as a lingua-ism, a state in which a person lacks (13) full, fluent command of any language. Second, born and bred bilinguals (14) don’t know the culture of the target language well enough to (15) top-quality translations, or cannot recognize what aspects of the source language (16) its culture need to be treated with particular care, as they (17) in a sense too close to the language. And last, they often (18) the analytical linguistic skills to work through a sticky text.
On (19) other hand, the acquired bilingual may not have the sam0e in-depth (20) of colloquialisms, slang, and dialect that the born bilingual has. Also, the acquired bilingual will not be able to translate as readily in both directions (from B to language A and A to language B). Finally, born bilinguals often have a greater appreciation of the subtleties and nuances of both their languages than someone who learns their B language later in life can ever hope to have.
查看答案