写蜗牛的作文400字

星期天下午，天气十分闷热，我走进院子，摆弄着爸爸的“宝贝花草”。忽然，看到一只蜗牛缓缓地爬上了叶子。“蜗牛是害虫还是益虫？”“为什么它走过的地方总留下长长的一条线？”“它的鼻子、眼睛在哪里？”一连串的问号浮上我的脑海。

我跑进屋，问正在看报的爸爸，爸爸笑着说：“你既然想知道蜗牛的秘密，为什么不亲自去实验一下呢？”“对呀！我怎么没想到呢！”于是，我决定自己去实验一番。

“蜗牛是害虫还是益虫？”我先采取“用各种食品实验乌龟的方法”来测验蜗牛，我先捡来了白菜叶子、馒头和小蚊子等，然后又捉了几只蜗牛，分别编了号，把它们放在这些食物面前，大概它们都饿极了，爬向了自己喜爱的食物，只是每只蜗牛都选上了白菜叶子，嚼了起来，而对别的食物却闻也不闻。不大会儿，白菜叶子便给吃光了。这下，我得出初步的结论，蜗牛是害虫。

接着我又进行了第二项实验，分析“蜗牛爬行时为什么会留下一条长长的线”，我把蜗牛捉到高处，等它头伸出壳时，便想去捉住它的身子，可是我的手还没碰着蜗牛，它的头又缩回去了。我想，这蜗牛真是“胆小鬼！”连续试了几次，都没有成功，我真有点泄气了。这时，爸爸走过来说：“干事情刚开始就灰心，长大了还想当科学家呢！”我被爸爸这么一“激”，又来劲了。忽然，一个办法又从我脑海中闪过。“有了，有了！”我高兴得手舞足蹈。我用一块尖石块小心翼翼地敲破蜗牛壳，抽出蜗牛身子，用手摸了摸它的下面，只觉得粘糊糊的，隐约还有小粒的东西，这是什么呢？经过查阅书本，我找到了答案，原来那小粒的东西是它的脚，那粘糊糊的就是蜗牛的排泄物，它有助于蜗牛的爬行。

最后，我想看看蜗牛的眼睛、鼻子在哪里。我把一片白菜叶放在一只蜗牛面前，只见那只蜗牛先伸出一对较长的触手碰了碰，又用下面较短的另一对触手再碰了碰，这才大口大口地吃起来。我想：大概一对是眼睛，另一对是鼻子吧。可是到底哪对是眼睛，哪对是鼻子呢？我又取了一片树叶子，再拿来一片同样大小的白菜叶，分别放在另一只蜗牛面前，由于差别不很大，这下蜗牛的眼睛可派不上用场啦！只见它用小触手碰碰，便知道哪个是白菜叶子，哪个是树叶子了。这下，我又发现了一个秘密：大触手具有眼的功能，小触手具有鼻的功能。

通过这一连串实验，真是收益不小！我不但发现了蜗牛的秘密，还明白了一个道理：长大要想有所发明创造，就必须从小培养发现问题，并学着解决问题的能力。

【简评】

文章主线清楚，整个布局是依“问题的提出—逐个实验—明白道理”的顺序记叙的。重点部分的三个自然段分别写了三个小实验，写三个小实验分别按实验的方法—经过—结果—推断的顺序记叙，条理性很强，结尾能深入地阐明成功的道理，使文章有较深刻的思想意义。

另外，作者观察细致，善于思考，使这篇状物文章又平添了一种科学性，让人增长知识，给人启迪。

许多时候，我不忍看那些永远凝滞于墙壁的蜗牛。它们给我了太多太多的启示，它们甚至让我懂得的人生之道！

　　看着那些一个个已经干白的蜗牛，有高有低，但无一不在朝向上方，仿佛在向我们诉说冥冥中命运的召唤，向我们昭示追求者悲壮灵魂的归宿。

　　我凝视着它们，仿佛又看见了蜗牛攀高的过程。

　　它仰视那“千仞”的墙壁，它想证明自己，它要向“陡高”的墙壁挑战，它要把自己的生命交给征途。有年老的蜗牛的劝阻，可是它根本就不想听，因为它不愿永远地生活在低低的地上，它想接近蓝天，它想看看为什么鸟儿能在空中自由的飞翔而自己只能在地上踽踽独行。它艰难的上路，选择了永不回复的前行。

　　地越来越远，天越来越近，可是它也感到越来干，越来越吃力。想过放弃，想过剥落自己，想过回到湿湿的地面，心不甘啊！可是望望头顶的路，却还有难以企及的距离，自己能爬上吗？

　　不能！蜗牛清醒的知道，可是就是因为不能就放弃吗？也不能！既然已经选择了，就要为了选择坚持到自己能坚持到的最后一刻吧！

　　路在延伸，一点点的延伸，精力在消耗，一点一点的耗尽，可是眼界却在整倍地扩大。它已经看见许多蜗牛看不见的宽广的天地，它看见后边有那么多的蜗牛也在跟着自己攀爬，蜗牛笑了，笑了才知道自己笑得僵硬。小小的蜗牛欣慰地知道，自己已经到了自己人生的最高峰了，它也怆然的清楚自己的生命到了尽头。

　　它有点抓不住那坚硬的墙壁了，“不，我不能掉下，我要死在路上，我要永远停留在这儿，给后来的同伴们做路标！”

　　小蜗牛用尽最后一丝力气，让自己的触角与墙壁深深地结合，凝滞成永远的雕塑。

　　小小的蜗牛在我的心里是那样的高大，它哪里是凝滞于墙壁，而是凝滞在我的心里。小小的蜗牛死了，我却仿佛看见它悠闲地活在我的心里。

有人曾说，世界上只有两种动物能到达金字塔顶，一种是老鹰，一种是蜗牛。 　
　　前者很容易被人想到，因为老鹰不但会飞翔，更是天空中的王者，只有它，才能配得上是到达金字塔顶的动物。而后者却叫人不解，为何会是一只弱小的蜗牛，而不是什么森林之王，老虎猎豹等。细想一下，其实也很容易就能找出答案，是蜗牛的坚持。 　
　　蜗牛虽然爬的很慢，却是时刻不停地在向上爬，从不放弃，也不停止，是它坚韧不拔的毅力带它来到塔顶。这很容易让我们联想到龟兔赛跑中的乌龟，明知道自己赢的机会近乎为零，在比赛中却始终不放弃，最后，是它的坚持到底为它带来了胜利。 　
　　在现实生活中，如果我们没有像老鹰般的天赋与魄力，那就应该多学习蜗牛精神。坚持到底，永不放弃。而如今快节奏的生活往往给我们的坚持予以考验，我们总抱怨没有足够的时间和精力去坚持做一件事，或是由于外界的压力和重重阻难让我们停止了对自己喜爱之事的坚持，但不积跬步，何以至千里，不积小流，又何以成江海呢？圣贤说过：未成一篑，止，吾止也，虽覆一篑，进，吾往也。这便是蜗牛精神最好的诠释，虽然前进缓慢，但每一步都让我们更接近终点。 　
　　历史上，也有许多人因他的坚持而精神不朽，孙中山小时候留洋学习，受到西方教育的影响极深，于是他撕掉了家中门神灶神的画像，在传统中国家庭中自是视之为忤逆之举，他的哥哥孙眉一气之下更是将他送回老家，但孙中山不改其行事作风，后来他的哥哥逐渐明白了孙中山所坚持的是一种伟大的精神，于是在孙文后来的革命事业中出钱出力，鼎力相助，陈少白更是给出了：“弟是华盛顿，兄是拿破仑。”的客观评价。 　
　　正是孙中山先生始终如一的坚持，感动了其兄，才换来了兄长的理解和支持。 　
　　我们要秉承这种坚持不懈的蜗牛精神，终有一天会到达成功的彼岸。 　
　　一只蜗牛虽然渺小得微不足道，但他对于坚持的信念却比天高，要坚信：坚持到底，就是胜利！

　　我也要做一只永不放弃追求的小蜗牛，即使悲壮，即使死在路上，也要朝向路的前方！

　　这不就是我们应该学习的精神吗？看准自己的目标，朝目标冲，坚持不懈，永远不放弃追求

星期天下午，天气十分闷热，我走进院子，摆弄着爸爸的“宝贝花草”。忽然，看到一只蜗牛缓缓地爬上了叶子。“蜗牛是害虫还是益虫？”“为什么它走过的地方总留下长长的一条线？”“它的鼻子、眼睛在哪里？”一连串的问号浮上我的脑海。

我跑进屋，问正在看报的爸爸，爸爸笑着说：“你既然想知道蜗牛的秘密，为什么不亲自去实验一下呢？”“对呀！我怎么没想到呢！”于是，我决定自己去实验一番。

“蜗牛是害虫还是益虫？”我先采取“用各种食品实验乌龟的方法”来测验蜗牛，我先捡来了白菜叶子、馒头和小蚊子等，然后又捉了几只蜗牛，分别编了号，把它们放在这些食物面前，大概它们都饿极了，爬向了自己喜爱的食物，只是每只蜗牛都选上了白菜叶子，嚼了起来，而对别的食物却闻也不闻。不大会儿，白菜叶子便给吃光了。这下，我得出初步的结论，蜗牛是害虫。

接着我又进行了第二项实验，分析“蜗牛爬行时为什么会留下一条长长的线”，我把蜗牛捉到高处，等它头伸出壳时，便想去捉住它的身子，可是我的手还没碰着蜗牛，它的头又缩回去了。我想，这蜗牛真是“胆小鬼！”连续试了几次，都没有成功，我真有点泄气了。这时，爸爸走过来说：“干事情刚开始就灰心，长大了还想当科学家呢！”我被爸爸这么一“激”，又来劲了。忽然，一个办法又从我脑海中闪过。“有了，有了！”我高兴得手舞足蹈。我用一块尖石块小心翼翼地敲破蜗牛壳，抽出蜗牛身子，用手摸了摸它的下面，只觉得粘糊糊的，隐约还有小粒的东西，这是什么呢？经过查阅书本，我找到了答案，原来那小粒的东西是它的脚，那粘糊糊的就是蜗牛的排泄物，它有助于蜗牛的爬行。

最后，我想看看蜗牛的眼睛、鼻子在哪里。我把一片白菜叶放在一只蜗牛面前，只见那只蜗牛先伸出一对较长的触手碰了碰，又用下面较短的另一对触手再碰了碰，这才大口大口地吃起来。我想：大概一对是眼睛，另一对是鼻子吧。可是到底哪对是眼睛，哪对是鼻子呢？我又取了一片树叶子，再拿来一片同样大小的白菜叶，分别放在另一只蜗牛面前，由于差别不很大，这下蜗牛的眼睛可派不上用场啦！只见它用小触手碰碰，便知道哪个是白菜叶子，哪个是树叶子了。这下，我又发现了一个秘密：大触手具有眼的功能，小触手具有鼻的功能。

通过这一连串实验，真是收益不小！我不但发现了蜗牛的秘密，还明白了一个道理：长大要想有所发明创造，就必须从小培养发现问题，并学着解决问题的能力。

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