外研版高中英語必修3module4sandstormsinasiaintroduction同步練習(編輯修改稿)
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【文章內(nèi)容簡介】 e. When it was put back, the blood again had its antifreeze quality and a lowered freezing point. Study showed that it is an unusual kind of protein. It has many small sugar molecules (分子 ) held in special positions within each big protein molecule. Because of its sugar content, it is called a glycoprotein. So it has e to be called the antifreeze fish glycoprotein, or AFGP. 短文解析： 本文介紹了南極鱈魚這一特殊物種，并揭露了它抵御嚴寒的獨特秘密：一種糖蛋白質(zhì)。 1． What is the text mainly about? A． The terrible conditions in the Antarctic. B． A special fish living in freezing waters. C． The ice shelf around Antarctica. D． Protection of the Antarctic cod. 答案： B 解析： 由全文可知，本文介紹了南極鱈魚的神奇所在。 2． Why can the Antarctic cod live at the freezing temperature? A． The seawater has a temperature of ℃ . B． It loves to live in the ice salt mixture. C． A special protein keeps it from freezing. D． Its blood has a temperature lower than ℃ . 答案： C 解析： 由第五段第二句話可知。 3． What does the underlined word “ it” in Paragraph 5 refer to? A． A type of ice salt mixture. B． A newly found protein. C． Fish blood. D． Sugar molecule. 答案： B 解析： 第五段講的是鱈魚的血液不怕南極嚴寒的原因是奇特的以前未發(fā)現(xiàn)過的蛋白質(zhì)。最后兩句講的是這種蛋白質(zhì)的獨特性。因此 it 指新發(fā)現(xiàn)的這種蛋白質(zhì)。 4． What does “ glyco ” in the underlined word “ glycoprotein” in the last paragraph mean? A． sugar B． ice C． blood D． molecule 答案： A 解析： 由該詞所在句 “ Because of its sugar content” 可推知該詞前綴表示 sugar 的含義。 Ⅲ .完形填空 閱讀下面短文，理解大意，從題中所給的 A、 B、 C、 D四個選項中選出一個最佳答案。 Many times my friend June would say, “ If I ever get 1 ， I39。m moving into a bigger apartment and getting a pletely new 2 .” I would
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