研究发现橘皮精油和乳酸菌素（蛋白质）均有抑菌作用有很高的经济价值．请回答下列问题：

（1）橘皮中贮藏了大量的橘皮精油，由于橘皮精油的有效成分在水蒸气蒸馏时会____ ，使用水中蒸馏法又会发生____ 等问题，所以一般采用压榨法来提取．为了使橘皮精油易于与水分离，还要加入____ ，并调PH到7～8．

（2）为分离出优良的乳酸菌，需要配制____ （填“固体”或“液体”）培养基；若需长期保存菌种，可采取的方法是____ 

（3）某果农发现自家的一棵橘树具有抗虫性状，欲利用植物组织培养技术大量繁殖，最好选用____ （填“花粉”或“体细胞”）作培养材料．若用花药产生花粉植株，一般有两种途径，这两种途径之间的界限主要取决于培养基中____ ．

（4）进行抑菌试验时，在长满病菌的平板上，会出现以抑菌物质为中心的透明圈，可通过测定____ 来判断橘皮精油和乳酸菌素的抑菌效果．

—_______ nice day today! —Yeah, let's take a walk outside.

下图为美国宇航局拍摄的太阳活动照片，从中可以看到一个剧烈的太阳耀斑正在发生(日面正中)。据此完成小题。

Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子。每空格限填一词)
Climb up to the ____ floor, and you can enjoy a better view. (eleven)
____ , Grace made up her mind to live abroad with her daughter. (final)
It is a very ____ book for language learners to improve writing skills. (use)
Don't worry about your son. He is old enough to be independent and live by ____ . (he)
The movie KungFu Panda II is sure to ____ a large number of teenagers. (attractive)
If you don't go on a diet, it is ____  for you to lose weight. (possible)
The local people had to move away because of the serious ____. (pollute)
The great ____  gave his first show in Shanghai and the tickets sold out in minutes. (art)