在建设中国特色社会主义伟大实践的新时代，弘扬民族精神仍具有重大意义。（   ）

电路中要有持续电流应满足两个条件，一是电路中必需有 ____，二是电路必须是 ____

阅读下面材料，在空白处填入适当的内容（一个单词）或括号内单词的正确形式。答案写在答题卷上。
    Are you facing a situation that looks impossible to fix?
    In 1969, the pollution was terrible along the Cuyahoga River near Cleveland, Ohio. It ____ (be) unimaginable that it could ever be cleaned up. The river was so polluted that it ____ (actual) caught fire and burned. Now, years later, this river is one of ____ most outstanding examples of environmental cleanup.
    But the river wasn't changed in a few days ____ even a few months. It took years of work ____ (reduce) the industrial pollution and clean the water . Finally, that hard work paid off and now the water in the river is ____ (clean) than ever.
    Maybe you are facing an impossible situation. Maybe you have a habit ____ is driving your family crazy. Possibly you drink too much or don't know how to control your credit card( 信用卡) use. When you face such an impossible situation, don't you want a quick fix and something to change immediately?
    While there are ____ (amaze) stories of instant transformation(转变)，for most of us the ____ (change) are gradual and require a lot of effort and work, like cleaning up a polluted river. Just be ____ (patience)

深冷分离法又称低温蒸馏法．该法能将空气中的氧气和氮气分离出来，深冷分离法原理：以空气为原料，经压缩等处理使空气成为液态空气（液空）．再进入干燥净化器，除去其他成分，最后分离出氮气和氧气．

（1）物质的变化有物理变化和化学变化．深冷分离法属于____ 变化．

（2）空气经压缩等处理成液空的过程中发生的物态变化是____ ．

Indonesia_____ some 3,000 islands stretching more than 2,000 miles from east to west.