2018年考研英语一大作文通常要求考生根据一幅图画进行写作，描述图画内容并阐述其背后的含义。以下是根据您提供的信息和我所知知识整理出的一个可能的作文框架：
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作文开头：
描述图画内容，简要介绍图画中展现的场景。
作文中间：
1. 分析图画中反映的现象，比如学生在选择课程时的犹豫和考量。
2. 阐述学生在选择课程时面临的两种课程类型：一种是高分数、易通过但作业少，另一种是包含新知识、注重创新和挑战性的课程。
3. 讨论学生在选择课程时应考虑的因素，如创新、知识的更新、个人兴趣与未来规划等。
4. 可以提出自己的观点，比如倾向于选择更具挑战性的课程，并解释原因。
作文结尾：
总结观点，强调选择课程时考虑全面和长远的重要性，以及面对未来挑战的准备。
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参考范文：
As is vividly depicted in the picture, a college student is sitting in front of a computer, engrossed in the process of selecting courses online. His facial expression suggests a mixture of contemplation and indecision, as he weighs the pros and cons of each option. The chart in front of him lists various criteria such as innovation, knowledge freshness, difficulty level, passing rate, and assignment burden. The caption "In the course of selecting courses" underscores the importance of making a thoughtful decision.
In my opinion, the student should prioritize courses that offer new knowledge, foster innovation, and challenge his abilities. While grades and ease of passage may seem attractive initially, investing in challenging courses can lead to deeper understanding and long-term professional growth. The ability to adapt to new challenges and innovations is crucial in today's rapidly evolving world.
In conclusion, while the choice of courses may seem daunting at first, a well-rounded consideration of all factors is essential. By choosing courses that push boundaries and foster personal development, students can lay a solid foundation for their future careers.
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请注意，以上内容仅为一个参考框架，实际写作时可以根据自己的理解和观点进行调整。希望这对您有所帮助，