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作文标题: 吃虫子
关 键 词: 吃虫子 小学五年级 500字
字 数: 500字作文
本文适合: 小学五年级
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本作文是关于小学五年级500字的作文,题目为:《吃虫子》,欢迎大家踊跃投稿。
吃虫子看了题目,你可千万、千千万万别误会,这可不是吃虫子比赛,也不是吃什么肉嫩味鲜特别肥的虫子,而是我在背课文时,张着嘴巴,一只极其娇小的虫子自愿送进了这张嘴巴。今天我抄完《牧场之国》之后,开始背课文,我为了通气,就一直把窗户开老大老大的,我刚背完《牧场之国》的第一、第二段(就是:荷兰,是水之国,花之国,也是牧场之国。一条条运河之间的绿低地上、、、、、、)刚背出,正要背第三段时,我发现有两三只虫子在我的头顶、耳朵和笔上盘旋着,弄得我不叮也痒,我的注意力渐渐从书上转移到爱盘旋的三位小虫子上,因为我被三位虫子同胞弄得恼火了,所以我想去打它们。“啪”! 作文标题: 小鸡吃虫子
关 键 词: 小鸡 小学三年级 300字
字 数: 300字作文
本文适合: 小学三年级
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本作文是关于小学三年级300字的作文,题目为:《小鸡吃虫子》,欢迎大家踊跃投稿。
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关 键 词: 小鸡 小学二年级 300字
字 数: 300字作文
本文适合: 小学二年级
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本作文是关于小学二年级300字的作文,题目为:《小鸡吃虫子》,欢迎大家踊跃投稿。
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托福阅读会涉及到各种性质的段子,其中学术类的段子比较多一些,考生在进行托福阅读练习时,也应该选一些类似的段子来模拟练习。下面为您提供托福阅读材料“托福阅读:会吃虫子的猪笼草”供大家阅读,希望对大家有所帮助。
Pitcher plants are carnivorous plants whose prey-trapping mechanism features a deep cavity filled with liquid known as a pitfall trap. It has been widely assumed that the various sorts of pitfall trap evolved from rolled leaves, with selection pressure favouring more deeply cupped leaves over evolutionary time. However, some pitcher plant genera (such as Nepenthes) are placed within clades consisting mostly of flypaper traps: this indicates that this view may be too simplistic, and some pitchers may have evolved from flypaper traps by loss of mucilage.
Whatever their evolutionary origins, foraging, flying or crawling insects such as flies are attracted to the cavity formed by the cupped leaf, often by visual lures such as anthocyanin pigments, and nectar bribes. The sides of the pitcher are slippery and may be grooved in such a way so as to ensure that the insects cannot climb out. The small bodies of liquid contained within the pitcher traps are called phytotelmata. They drown the insect, and the body of it is gradually dissolved. This may occur by bacterial action (the bacteria being washed into the pitcher by rainfall) or by enzymes secreted by the plant itself. Furthermore, some pitcher plants contain mutualistic insect larvae, which feed on trapped prey, and whose excreta the plant absorbs.[1] Whatever the mechanism of digestion, the prey ite...
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