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MOCK TEST 1 Why does the author discuss studies on fish and other marine organisms?

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The Impact of Microplastics
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Microplastics, small plastic particles less than 5 millimeters in diameter, are increasingly found in our environment. These particles originate from larger plastic debris that breaks down over time and from products like cosmetics and clothing. Microplastics have been detected in marine and freshwater systems, soil, and even the air we breathe.

The presence of microplastics in water bodies poses a serious threat to aquatic life. Fish and other marine organisms ingest these particles, leading to physical harm and toxic effects. Studies show that microplastics can accumulate in the tissues of these organisms, potentially affecting their growth and reproduction. The impact on food chains and ecosystems is profound, as smaller organisms are consumed by larger ones, leading to a buildup of microplastics through the food chain.

Humans are also affected by microplastics. Research indicates that microplastics can enter the human body through ingestion and inhalation. The long-term health effects are still being studied, but there are concerns about their potential to cause inflammation and disrupt hormonal functions. Efforts to mitigate the impact of microplastics include improving waste management practices and developing biodegradable alternatives. Raising awareness about the sources and dangers of microplastics is crucial for reducing their presence in the environment.

3.Why does the author discuss studies on fish and other marine organisms?

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1. 题干: Why does the author discuss studies on fish and other marine organisms? 作者为什么讨论关于鱼类和其他海洋生物的研究? 2. 分析:题目类型:修辞目的题。解题策略:分析作者引用具体例子或研究是为了支持或说明哪个更宏观的观点或论点。 3. 定位信息理解:原文定位:该段首句提出观点:“微塑料在水体中的存在对水生生物构成严重威胁。”随后的句子,包括对鱼类等生物的研究(摄入、物理伤害、毒性、组织积累、影响生长繁殖),以及最终通过食物链扩大影响,都是用来支持和详细阐述这个“严重威胁”的观点。信息理解:作者讨论这些研究,是为了具体化、证据化“严重威胁”这一说法,即突出微塑料造成的具体物理伤害和毒性影响。 4. 分析选项:(A) To highlight the physical harm caused by microplastics (为了强调微塑料造成的物理伤害) - 分析:该选项最直接地概括了讨论这些研究的主要目的。研究细节(摄入、物理伤害、组织积累)都指向了具体的危害。此为正确答案。 (B) To compare the effects of microplastics on different species (为了比较微塑料对不同物种的影响) - 分析:文章是提到了“鱼类和其他海洋生物”,但并未对不同物种的影响进行比较,而是将他们作为一个整体来举例说明危害。 (C) To explain how microplastics break down (为了解释微塑料如何分解) - 分析:分解过程在第一段提到,与第二段讨论生物影响的目的无关。 (D) To illustrate the relationships between organisms in food chains (为了说明食物链中生物之间的关系) - 分析:虽然最后一句提到了食物链,但这是在说明危害如何通过食物链扩大和累积。讨论研究的主要目的是揭示危害本身,食物链是危害传播的途径。目的A更贴近核心。

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