历史上巨行星（如木星和土星）的大气成分变化可能较小，而现在它们的大气中都没有游离氧，其主要成分是氢气、氦气、甲烷和氨．由此推断，原始地球空气成分和木星、土星上的大气成分类似．1953年米勒做了一个探索地球上的生命是如何起源的实验．米勒向装置中通入推测的原始大气成分：甲烷、氢气、氨、水蒸气，通过放电和紫外线照射的方法模拟原始地球的环境条件，获得了多种氨基酸．请根据下图回答下列问题．

（1）米勒实验属于____  （选填““对照实验”或“模拟实验”）．

（2）米勒试验装置中大容器内模拟了____ 的成分，它与现在的大气成分相比主要不含____ ．进行火化放电模拟____ ，主要为该实验提供____ ．

（3）米勒试验装置中煮沸的水模拟了____ ，冷凝后获得了氨基酸，氨基酸合成大分子____ ．

（4）通过这个试验米勒得出的结论是____ ．

（5）根据米勒的试验，部分学者提出了化学起源学说，他们认为生命起源的大致过程是：原始大气（无机小分子）→____ →____ →原始生命．

（6）通过以上实验，我们知道生命起源于____ 里．

根据材料内容，选择正确答案。

    School trips are one of the things that school children hope for about school. They are one way to show children that they can also learn much outside the classroom.

A good side of having a school trip is that children can use the learned or the learning things in class in true life. Knowledge in science and maths can be used. Then students will remember their lessons well. Also, students will have first-hand information on how their school subjects work outside classroom. For example, a visit to a museum can not only learn about history but can also learn about science or geography.

    What's more, always learning in classroom may make some kids lose interest in a subject. This is really true for some difficult subjects. However, kids can learn in new environments during school trips and take on as much information as they want and can.

    School trips also help kids get to know each other in a more relaxed environment, without thinking about tests or grades.

    Showing students the larger world around them can really help them learn more.