分析 本文是一篇科教類閱讀,屬于說明文,本文以美國棕熊的毛色隨地理分布而不同展開,主要從毛色,特點(diǎn),吃的食物,冬眠行為以及交配方式等方面來向我們介紹了美國棕熊的生活習(xí)性.
解答 48.答案:B.推理判斷題.根據(jù)"In the eastern part of their range(地理分布區(qū)),most of these bears have shiny black fur,but in the west they grow brown,red or even yellow coats.To the north,the black bear is actually gray or white.Even in the same litter(窩),both brown and black furred bears may be born."可推測(cè)出,美國棕熊的毛色隨他們生活范圍的不同而改變.故選B.
49.答案:A.細(xì)節(jié)理解題.根據(jù)"Their eyes and ears are small and their eyesight and hearing are not as good as their sense of smell."可知,美國棕熊的眼睛和耳朵很小,他們的視力和聽力不像他們的嗅覺那么好,故棕熊的嗅覺比較好.故選A.
50.答案:A.細(xì)節(jié)理解題.根據(jù)"One of the most interesting characteristics of bears,including the black bear,is their winter sleep.Unlike many other animals,bears do not actually hibernate(冬眠)."可知,美國棕熊的冬眠行為是獨(dú)特的.故選A.
點(diǎn)評(píng) 本文是一篇科教類閱讀,題目涉及主旨大意題,細(xì)節(jié)理解題.做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文,把握文章主要內(nèi)容,聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義,從中選出正確答案,一定要做到有理有據(jù),切忌胡亂猜測(cè).
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