分析 本文講述了科學(xué)家研制出假關(guān)節(jié),以來(lái)幫助那些關(guān)節(jié)受傷的人能自由移動(dòng),以及在制作假關(guān)節(jié)時(shí)需要注意的事情.
解答 81 The joints./Our joints.
82.Over a century./More than 100 years.
83.It produces cells that attack and destroy the substances./By producing cells that attack and destroy the substances.
84.Because the metal is strong and the plastic is flexible.
81.The joints./Our joints.細(xì)節(jié)理解題.根據(jù)文章第一 段Your joints are parts of your body that help your bones move這句話告訴我們?nèi)梭w關(guān)節(jié)部位幫助人身體移動(dòng).可以直接找到答案.
82.Over a century./More than 100 years.細(xì)節(jié)理解題.在第二段After over a century of trying,scientists are just beginning to find ways of making artificial joints that work well.這句話里的時(shí)間狀語(yǔ)over a century,說(shuō)明科學(xué)家開(kāi)始開(kāi)始研制的時(shí)間.
83.It produces cells that attack and destroy the substances./By producing cells that attack and destroy the substances.細(xì)節(jié)概括退.在注意事項(xiàng)的第三點(diǎn)里,Usually,the body reacts to foreign substances by producing cells that attack and destroy the substances.這句話告訴我們身體對(duì)外來(lái)物質(zhì)的抵抗主要因?yàn)檫@些物質(zhì)會(huì)產(chǎn)生一些有攻擊性的細(xì)胞.
84.Because the metal is strong and the plastic is flexible.細(xì)節(jié)概括題.最后一段The metal is strong,so it can support the weight of the body.The plastic is a flexible material.可以得知,金屬堅(jiān)硬,塑料柔軟,是作為人造關(guān)節(jié)的首選材料.
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