閱讀理解，請根據(jù)短文內(nèi)容，為每題確定1個最佳選項。

　　Night of the Living Ants

　　When an ant dies，other ants move the dead insect out of the nest．This behavior is interesting to scientists，who wonder how ants know for sure and so soon that another ant is dead．

　　Dong-Hwan Choe，a scientist at the University of California found that Argentine ants have a chemical on the outside of their bodies that signals to other ants．"I'm dead．take me away．"

　　But there's a twist to Choe's discovery．These ants ave a little bit like zombies(僵尸)．Choe says that the living ants，not just the dead ones，have this death chemicals．In other words．While an ant crawls around，perhaps in a picnic or home，it's telling other ants that it's dead．

　　What keeps ants from hauling away the liring dead?Choe found that Argentine ants have two additional chemicals on their bodies，and these tell nearby ants something like，"Wait-I'm not dead yet，"So Choe's research turned up two sets of chemical signals in ants：one says，"I'm dead．"the other set says，"I'm not dead yet．"

　　Other scientists have tried to figure out how ants know when another ant is dead． If an ant is knocked unconscious，other ants leave it alone until it wakes up．That means ants know that unmoving ants can still be alive．

　　Choe suspects that when an Argentine ant dies，the chemical that says"Wait-I'm not dead yet" quickly goes away.Once that chemical is gone，only the one that says"I'm dead"is left．"It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard(墓地)，not because its body releases new unique chemicals after death，"said Choe． When other ants detect the"dead"chemical without the"not dead yet"chemical，they haul away the body． This was choe's hypothesis(假設)．

　　To test his hypothesis，Choe and his team put different chemicals on Argentine ant pupae(蛹). When the scientists used the"I'm dead"chemical，other ants quickly hauled tbe treated pupae away. When the scientists used the"Wait-I'm not dead yet"chemicals，other ants left the treated pupae alone.Choe believes this behavior shows that the"not dead yet"chemicals override(優(yōu)先于) the"dead"chemical when picked up by adult ants． And that when an ant dies，the"not dead yet"chemicals fade away．Other nearby ants then detect the remaining"dead"chemical and remove the body from the nest．

　　36．What is meant by"death chemical"mentioned in paragraph 3?

　　A．A chemical that contains poison．

　　B．A chemical that causes death．

　　C．A chemical that announces death．

　　D．A chemical that prevents death．

　　37．Which of the following statements is NOT true of ants?

　　A．Ants know very soon that another ant is dead．

　　B．When an ant is dead，others move its body out of the nest．

　　C．If an ant is unconscious，it is moved out of the nest．

　　D．Living ants have the"I'm dead"chemical on their bodies．

　　38．According to Choe's hypothesis，___________.

　　A．a(chǎn)n ant still smells like a living when it dies

　　B．the"I am dead"chemical leaves the ant's body when it dies

　　C．the"I am not dead yet"chemical is left when an ant dies

　　D．the"I am not dead yet"chemical leaves the ant's body when it dies

　　39．According to paragraph 7，what is the result of the test on Choe's hyothesis?

　　A．It shows that his hypothesis is wrong．

　　B．It proves that his hypothesis is convincing．

　　C．It suggests that his hypothesis needs revising．

　　D．Not enough evidence has been found to support his hypothesis．

　　40．The passage"Night of the Living Ants"tells us about________.

　　A．how an ant is moved out of the nest at nigh

　　B．what an ant does at night

　　C．how an ant finds its way in darkness

　　D．what happens when an ant dies

　　參考答案及解析

　　36．C [解析]本題是細節(jié)考查題。原文在第二段"加州大學科學家周東環(huán)發(fā)現(xiàn)阿根廷螞蟻的身體能向外釋放一種化學物質(zhì)告訴同伴：'我死了，把我挪走吧。'"選項A"含有毒物質(zhì)的化學品"與原文不符；選項B"導致死亡的化學物質(zhì)"與原文不符；選項C"宣布死亡的化學物質(zhì)"，符合原文；選項D"阻止死亡的化學物質(zhì)"與原文不符，因此只能選C。

　　37．C [解析]本題是細節(jié)考查題。選項A"螞蟻們很快知道有同伴死了"符合原文內(nèi)容：選項B"當有螞蟻死了，其他同伴把它的尸體挪出蟻穴"符合原文內(nèi)容；選項C"有螞蟻昏迷了，它會被拖出蟻穴"不符合原文內(nèi)容，符合選項要求；選項D"活螞蟻身上有'我活著'化學物質(zhì)"，與原文相符。因此只能選C。

　　38．D[解析]本題是細節(jié)考查題。選項A"螞蟻死后氣味依然和活著時一樣"與原文不符；選項B"'我已死'化學物在螞蟻死后會消失"與原文不符；選項C"螞蟻死后，'我還沒死'化學物質(zhì)留在尸體上"與原文不符；選項D"'我沒死'化學物質(zhì)在螞蟻死后會消失"與原文相符。因此只能選D．

　　39．B [解析]本題是閱讀理解能力考查題。周的假設是當其他螞蟻監(jiān)測到"我沒死"化學物質(zhì)消失了，而只有"我死了"物質(zhì)，它們就將尸體拖走。而實驗結(jié)果是當科學家用"我已死"化學物質(zhì)時，螞蟻們立刻將處理過的蛹拉走。當科學家使用"等等，我還沒死"這一化學物質(zhì)時，其他螞蟻并不碰這個蛹。結(jié)果證明了周假設的正確性。選項A"他的假設是錯誤的"，不符合原文；選項B"他的假設有說服力"，符合原文；選項C"他的假設需要修改"，不符合原文；選項D"他沒有發(fā)現(xiàn)有力的證據(jù)證明這一假設"，與原文不符。所以只能選B。

　　40．D [解析]本題是閱讀綜合理解能力考查題。選項A"一只螞蟻怎樣被移出蟻穴"不是文章主旨；選項B"螞蟻在晚上做什么"不是文章主旨；選項C"螞蟻如何在黑暗中找到路"不是文章主旨；選項D"螞蟻死后會發(fā)生什么"符合文章內(nèi)容。因此只能選D。

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