2020年部编版语文四年级下册短文课外阅读专项练习.pdf
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1、2020 年部编版语文四年级下册短文课外阅读专项练习(含答案)短文一到火星上去种草到火星上去种名为“拟南芥”的植物草,这话激动人心,也令人生疑。当然,在火星上种草,是由机器人代劳的。这个机器人将随同着落器降落火星,对火星土壤状况进行数据采样,传给地面科学家分析,然后科学家们控制机器人通过施肥、浇水对火星土壤进行改良,营造出拟南芥能够生存的环境。拟南芥的种子,并非直接播入火星土壤,而是首先在着落器中的微型温室里萌芽,待长成幼苗后再移栽到火星的泥土中。拟南芥之所以被选为挺进火星的先锋,是因为它有独特的优点。它不但个头矮,最高不过二十多厘米,而且生长周期短,一个月内即可发芽抽叶。更重要的是这种杂草状
2、的十字花科植物基因在所有植物基因组中先被完整破译。这种拟南芥非寻常种类,而是经过了转基因技术改造的。它被插入了一些所谓的“报告基因”,能够发出绿莹莹的光,报告自己在火星上是否生了病,是否遭遇高温、干旱等恶劣天气。科学家根据转基因拟南芥发回的种种报告,采取有效的护理措施,使得它们在火星上更好地生长。花这么大的气力到火星上去种草,主要是为了实践科学家们提出的“生态合成”理念。具体来说,是想验证能否通过植物来吸纳火星大气层中的二氧化碳,从而制造出生命演进所需要的氧气。在那昼夜温差悬殊,湿度只有0.03%的火星上,草能种得活吗?1.“它被插入了一些所谓的报告基因”中的“它”指:_ 2.第段中所说的“这
3、种拟南芥”具有哪些特点?请分点概括回答。_ _ 3.根据文意,科学家控制机器人完成()的工作。(多选)A 土壤数据采样 B改良土壤 C移栽幼苗 D护理生长4.花大气力到火星上去种草的原因是什么?请在原文中用“_”画出相关句子。5.到火星上去种草,为什么这是“令人激动”的,又是“令人生疑”的?根据文意,做简要回答。_ _ 6.选文中有一些术语比较难懂,比如第段中的“二氧化碳”,我会用 _ 的方法来理解。7.第段“它不但个头矮,最高不过二十多厘米,而且生长周期短,一个月内即可发芽抽叶。”中的“最高不过二十多厘米”可以换成“最高不过二十厘米”吗?为什么?_ _ 8.如果拟南芥能够在火星上存活,到那时
4、,火星的前景是怎样的?_ 短文二金鱼热悄悄地在我们城市兴起,城里那么多人养金鱼,我却一条也没有,这使我闷闷不乐。我头一次得到金鱼的狂喜只持续了短短的五天,那是姐姐带回了四条品相优美的五彩珍珠。我记得那四条金鱼红色脊背()上洒满白色的斑点,为此那五天里我出没在养鱼人出没的水塘和护城河边,拼命打捞鱼虫,文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A
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6、 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7
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8、文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:C
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11、A10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7为金鱼囤积食粮,可我不知道我的金鱼饱食过度濒临()死亡的边缘。第五天下午放学回家,我看见的是四条翻了肚子的金鱼。我至今羞于提及我当时的表现,在一场惊天动地的痛哭声中,我忘了追寻金鱼的死因。我从未见过死去的金鱼,死去的金鱼是如此丑陋,从美丽到丑陋,仿佛是一个狡诈的骗局。我觉得自己受到了嘲弄,不仅失去,同时也受到了伤害。后来母亲把一条歪尾巴的小金鱼带回了家,它当时混在几条稍大的“丹玉”金鱼中,显得那么卑琐而低贱。它只有半指大小,黑乎乎的,甚至看不出是什么品种。它太特殊
12、了,尤其是那条歪尾巴,它与金鱼之美背道而驰,我以一种嫌厌的心情给它取了这个名字:歪尾巴。金鱼热渐渐退潮,那批“丹玉”在几个月中纷纷离我而去。可我注意到“歪尾巴”的生命力,它在我的鱼缸里越来越显示出一种主人翁的姿态,在孤独和饥饿中成长着,身子悄然()泛出了红色,而它额头上方越长越大的眼睛正用矜持的态度告诉我,我不是歪尾巴,我是一条“朝天龙”!在所有美丽的金鱼逃离我的鱼缸后,在我对金鱼渐渐地失去兴趣之后,“朝天龙”一直伴随了我四年时光。四年之后我已经远离家乡,在北京的学府里寒窗苦读,那些日子里我从来没有想起过我的歪尾巴金鱼。有一天姐姐来信,信中提到了我的最后一条金鱼,说歪尾巴死了。说她梳头时不小心
13、将梳子掉进了鱼缸,梳子与金鱼一起呆了一会儿,梳子没事,金鱼却死了。我承认是歪尾巴金鱼的死让我重新回顾了我短暂的养鱼生涯。我最终对这些小生命充满了歉意,一切都是命定的,就像我对金鱼的饲养注定不能修得正果,我不能将金鱼奉献给任何国王,我的歪尾巴金鱼甚至不能奉献给我自己。这是一条世界上最倔强()的金鱼,它最终背叛了应该背叛的人,将自己奉献给了一把梳子。1.给文中加点字注上正确的读音。2.对于金鱼热,我的表现是(),请从文中找出恰当的词语。文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5
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15、:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6
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17、 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G
18、2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1
19、Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4
20、P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A73.请认真阅读文段,简要概括文章的主要内容。4文中写到母亲把一条歪尾巴的小金鱼带回了家时,“我”为什么说它“显得那么卑琐而低贱”呢?5.文中写到“我”前后两次养金鱼,试从金鱼的外形、“我”的态度、金鱼的死因三方面比较两者的不同。6.作者通过回忆这段经历,带给我们什么感受?(6 分)短文三冰项链青铜对葵花的脖子上没有一条项链,当然无
21、可奈何。甚至是青铜一家,都无可奈何。天上有鸽哨声,他抬头去看天空时,没有看到鸽子,却看到了屋檐上的一排晶莹的冰凌。不知道为什么这些冰凌就那样富有魅力地吸引着他。他就这样仰头看着它们。文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A
22、7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:
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24、5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4
25、HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2A10X1Y4 ZR4P7A5Y5A7文档编码:CK2V6G5Q9Z4 HA10G2
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