根据您提供的信息，2018年考研英语一的大作文题目涉及学生在选择课程时的困境，这反映了我们在生活中经常面临的决策难题。以下是根据您提供的参考信息整理的作文结构和内容要点：
作文结构
描述图片：
简要介绍图片内容，包括学生的表情和电脑屏幕上的“课程选择系统”。
解释含义：
分析图片背后的象征意义，讨论学生在选择课程时面临的挑战和决策过程。
发表评论：
基于以上分析，给出自己的见解和观点。
参考范文
作文开头
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As the picture vividly illustrates, a college student is sitting in front of a computer, clearly torn between two types of courses. On the one hand, there are those that are demanding and progressive, promising to enrich his knowledge and skills. On the other hand, there are courses that are easier to pass, entailing less homework and potentially higher grades. The student's contemplative expression and the thought bubbles above his head suggest that he is struggling with the decision。（描述图片内容）
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作文中间
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The scenario depicted in the picture is a microcosm of the choices we face in our daily lives. Often, these choices lack clear-cut distinctions between right and wrong, forcing us to weigh the pros and cons of each option carefully. This process can be particularly challenging, as it requires us to evaluate not only the immediate outcomes but also the long-term implications of our decisions. The student's dilemma is not just about grades or ease of completion, but also about personal growth and the pursuit of meaningful learning experiences.
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作文结尾
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In conclusion, the picture serves as a reminder that decision-making is a complex and nuanced process. It is not always about choosing the easy path or the one that promises the most immediate rewards. Rather, it is about making choices that align with our values and goals, even when those choices are not the most straightforward. As we navigate through life's choices, may we have the wisdom and courage to make decisions that truly enrich our lives, rather than simply seeking the path of least resistance.
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注意事项
确保作文内容紧扣题目要求，不要照抄题目原句。
注意作文的字数控制，通常在160-200字之间。
使用恰当的语言和句式，保持文章清晰、连贯。
以上是根据您提供的信息整理的作文结构和内容要点，希望对您准备2018年考研英语一作文有所帮助。