专题06 备战2022年中考英语完形+阅读全演练

2021暑假新初三完型阅读每日一练（06） （2020青海中考）Ⅵ.阅读理解 Blue whales are the largest animals in the world. But they are amazing ___21___ because of their huge size, but their slow heartbeat. For the first time , scientists have researched the ___22___ of a blue whale. They found ___23___ when blue whales dive (潜水) for food, their heart rates (心率) are as ___24___ as 2 beats per (每) minute (bpm). Scientists used to ___25___ that their diving heart rate was 15 bpm. When the whales go to the ocean’s ___26___ to breathe, their heart rate is between 25 and 37 bpm. Usually, the larger an animal is, ___27___ its heart beats, since it takes more time to pump (输送) blood around ___28___ body. Shrews, the smallest mammals (哺乳动物), have a heart rate of up to 1,000 bpm. Humans usually stay between 60 and 100 bpm. ___29___ slowing their heart rate, blue whales can send more blood to the muscles (肌肉) that they use ____30____. These muscles become stronger, allowing the whales to dive for longer periods of time. 21. A. neither B. either C. not only D. although 22. A. heartbeat B. body size C. diving D. food 23. A. it B. that C. once D. if 24. A. many B. little C. fast D. slow 25. A. regard B. expect C. think D. doubt 26. A. bottom B. surface C. center D. side 27. A. the slower B. slower C. the faster D. faster 28. A. it’s B. its C. his D. her 29. A. By B. In C. On D. At 30. A. to pump blood B. to eat C. to breathe D. to dive 【答案】21. C 22. A 23. B 24. D 25. C 26. B 27. A 28. B 29. A 30. D 【解析】 这是一篇说明文，文章主要讲述科学家研究蓝鲸潜水觅食的时候，心跳很慢的原因。 【21题详解】 句意：但是它们很迷人，不仅是因为它们巨大的体积而且是因为它们的缓慢地心跳。 neither二者都不；either二者之一；not only不仅；although尽管。此处用的是not only…but(also)…表示“不仅……而且……”。故选C。 【22题详解】 句意：第一次，科学家研究蓝鲸的心跳。 heartbeat心跳；body size身体大小；diving潜水；food食物。根据后文“when blue whales dive for food, their heart rates”可知科学家研究的是心跳，用heartbeat。故选A。 【23题详解】 句意：他们发现当蓝鲸潜水觅食，心跳很慢每分钟跳两下。 it它，that那个；once曾经，一旦；if如果。found后面是宾语从句，用that引导从句，that在从句中没有实际的含义。故选B。 【24题详解】 句意：他们发现当蓝鲸潜水觅食，心跳很慢每分钟跳两下。 many很多；little几乎不；fast快；slo