外研版高中英語必修3 module 4《sandstorms in asia》（introduction）同步練習(xí)-文庫吧
2024-11-10 20:55 本頁面
【正文】 (should)＋原形。 stop doing sth.“ 停止做 ??” ， stop to do...“ 停下來去做 ??” 。 9． Although medical science________control over several dangerous diseases, what worries us is that some of them are returning. A． achieved B． has achieved C． will achieve D． had achieved 答案： B 解析： 此題考查動詞的時態(tài)，本句是以一般現(xiàn)在時的基礎(chǔ)，可由 worries 推斷，故 A、D 項首先排除。 句意：盡管醫(yī)學(xué)已經(jīng)成功控制了幾種危險的疾病，但令我們擔(dān)憂的是，有些疾病正在發(fā)生反彈。故 achieve 先于 worries 發(fā)生，并對其造成影響，故應(yīng)用現(xiàn)在完成時。 Ⅱ .閱讀理解 閱讀下面的短文，從每題所給的四個選項 (A、 B、 C、 D)中，選出最佳選項。 Far from the land of Antarctica(南極洲 ), a huge shelf of ice meets the ocean. At the underside of the shelf there lives a small fish, the Antarctic cod. For forty years scientists have been curious about that fish. How does it live where most fish would freeze to death? It must have some secret. The Antarctic is not a fortable place to work and research has been slow. Now it seems we have an answer. Research was begun by cutting holes in the ice and catching the fish. Scientists studied the fish39。s blood and measured its freezing point. The fish were taken from seawater that had a temperature of ℃ and many tiny pieces of ice floating in it. The blood of the fish did not begin to freeze until its temperature was lowered to ℃ . That small difference is enough for the fish to live at the freezing temperature of the ice salt mixture. The scientists39。 next research job was clear: Find out what in the fish39。s blood kept it from freezing. Their search led to some really strange thing made up of a protein (蛋白質(zhì) ) never before seen in the blood of a fish. When it was removed, the blood froze at seawater temperatur
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1