職稱(chēng)英語(yǔ)理工類(lèi)B級(jí)完形填空指導(dǎo)練習(xí)
Earths Inner Core
Scientists have long struggled to understand what lies at the planets center, Direct observation of its center is impossible,so researchers must_____to other evidence.
In 1889,a German scientist detected a severe earthquake in Japan.Geophysicists concluded that shock waves_____joltsfrom one side of Earth through the center to the other side.Then in 1936,Danish geophysicist Inge Lehmann studied the waves______ to determine that within Earths core of molteniron lies a solid inner core-but_____ that core was made of eludedher.Other geophysicists quickly determined that Lehmanns inner core was composed mostly_____iron. Since then, Lehmanns discovery has_____conventional Earth science.
But now scientists are challenging traditional theory with new and radical _____ For example,Earths center could actually contain aninner core within the inner core,claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave _____,they maintain that the inner core has at its heart a tiny, even more solid sphere . This spheremay be the oldest fossil____from the formation of Earth,says Dziewonski.
Dziewonski and Ishii speculate that shortly_____ Earth formed around 4.8billion years ago,a giant asteroidsmashed into the young planet and nearly melted it. But Earths center didnt quite melt;it______mass as the planet cooled. The core within a core may be the kernelthat endured.Its presence could change our basic ideas about the_____ of the planet,Dziewonski says idea is tamecompared to the_____theories of independent geophysicist J.Marvin Herndon.Earths inner core is made not of iron,he claims but a_____of nickel and silicon Hemdon has a truly revolutionary notion:Within the nickel silicideinner core is also aninnerinner core-an 8 km-wide ball of the element uranium.Uranium is radioactive.Hemdon thinks the uranium releases heat energy as its atoms_____fission-split and crash into another in a chain reaction. In other words,we may live on top of a gigantic, naturalnuclear power plant.
51 A try B leave C turn D point
52 A create B receive C feel D overcome
53 A work B solution C job D patterns
54 A whether B what C why D how
55 A from B within C of D to
56 A followed B dominated C restored D opposed
57 A ideas B demands C phenomena D movements
58 A things B acts C methods D records
59 A taken B benefited C left D kept
60 A after B before C since D when
61 A expanded B modified C gained D melted
62 A size B origin C structure D shape
63 A radical B traditional C classical D conventional
64 A system B copy C model D compound
65 A charge B last C experience D show
答案:
51 C turn to other evidence:尋求其他證據(jù)。Tum to屬固定搭配。
52 A create jolts:造成震動(dòng)。其他幾個(gè)選項(xiàng)意思不符。
53 D wayespatterns:波浪的形狀。科學(xué)家通過(guò)研究震波的形狀了解地球的情況。
54 B 此處的意思是地心是由什么構(gòu)成的難倒了她。這里應(yīng)使用what構(gòu)成名詞性從旬,作主語(yǔ)。
55 C compose of:由組成。固定短語(yǔ)。
56 B dominate:占統(tǒng)治地位,支配。Lehamann的發(fā)現(xiàn)在傳統(tǒng)地球科學(xué)領(lǐng)域占統(tǒng)治地位。
57 A 此處的意思是:現(xiàn)在的科學(xué)家正用新的、激進(jìn)的觀點(diǎn)挑戰(zhàn)傳統(tǒng)的理論。本題只有填ideas才符合本句的意思。
58 D 此處填records,本句的意思是:通過(guò)分析數(shù)十萬(wàn)次地震波的記錄,他們認(rèn)為。其他幾個(gè)選項(xiàng)與句意不符。
59 C left:留下來(lái)的。此處的意思是:這一球體可能是地球形成時(shí)留下來(lái)的最古老的化石。
60 A 依據(jù)上下文,應(yīng)用afte~句子意思才講得通。
61 C gain:獲取。gained mass as the planet cooled:在星球變冷的過(guò)程中,它逐漸獲得了質(zhì)量。
62 B 本文主要談地球起源問(wèn)題,故此處應(yīng)填ongm.
63 A 本句前面出現(xiàn)的一個(gè)詞是tame,與之對(duì)應(yīng),應(yīng)該是radical.
64 D nickel和silicon的混合物,compound:混合物。
65 C fission-split:裂變。經(jīng)歷裂變,用動(dòng)詞experience.
Earths Inner Core
Scientists have long struggled to understand what lies at the planets center, Direct observation of its center is impossible,so researchers must_____to other evidence.
In 1889,a German scientist detected a severe earthquake in Japan.Geophysicists concluded that shock waves_____joltsfrom one side of Earth through the center to the other side.Then in 1936,Danish geophysicist Inge Lehmann studied the waves______ to determine that within Earths core of molteniron lies a solid inner core-but_____ that core was made of eludedher.Other geophysicists quickly determined that Lehmanns inner core was composed mostly_____iron. Since then, Lehmanns discovery has_____conventional Earth science.
But now scientists are challenging traditional theory with new and radical _____ For example,Earths center could actually contain aninner core within the inner core,claim Ishii and colleague Adam Dziewonski.
Analyzing hundreds of thousands of earthquake wave _____,they maintain that the inner core has at its heart a tiny, even more solid sphere . This spheremay be the oldest fossil____from the formation of Earth,says Dziewonski.
Dziewonski and Ishii speculate that shortly_____ Earth formed around 4.8billion years ago,a giant asteroidsmashed into the young planet and nearly melted it. But Earths center didnt quite melt;it______mass as the planet cooled. The core within a core may be the kernelthat endured.Its presence could change our basic ideas about the_____ of the planet,Dziewonski says idea is tamecompared to the_____theories of independent geophysicist J.Marvin Herndon.Earths inner core is made not of iron,he claims but a_____of nickel and silicon Hemdon has a truly revolutionary notion:Within the nickel silicideinner core is also aninnerinner core-an 8 km-wide ball of the element uranium.Uranium is radioactive.Hemdon thinks the uranium releases heat energy as its atoms_____fission-split and crash into another in a chain reaction. In other words,we may live on top of a gigantic, naturalnuclear power plant.
51 A try B leave C turn D point
52 A create B receive C feel D overcome
53 A work B solution C job D patterns
54 A whether B what C why D how
55 A from B within C of D to
56 A followed B dominated C restored D opposed
57 A ideas B demands C phenomena D movements
58 A things B acts C methods D records
59 A taken B benefited C left D kept
60 A after B before C since D when
61 A expanded B modified C gained D melted
62 A size B origin C structure D shape
63 A radical B traditional C classical D conventional
64 A system B copy C model D compound
65 A charge B last C experience D show
答案:
51 C turn to other evidence:尋求其他證據(jù)。Tum to屬固定搭配。
52 A create jolts:造成震動(dòng)。其他幾個(gè)選項(xiàng)意思不符。
53 D wayespatterns:波浪的形狀。科學(xué)家通過(guò)研究震波的形狀了解地球的情況。
54 B 此處的意思是地心是由什么構(gòu)成的難倒了她。這里應(yīng)使用what構(gòu)成名詞性從旬,作主語(yǔ)。
55 C compose of:由組成。固定短語(yǔ)。
56 B dominate:占統(tǒng)治地位,支配。Lehamann的發(fā)現(xiàn)在傳統(tǒng)地球科學(xué)領(lǐng)域占統(tǒng)治地位。
57 A 此處的意思是:現(xiàn)在的科學(xué)家正用新的、激進(jìn)的觀點(diǎn)挑戰(zhàn)傳統(tǒng)的理論。本題只有填ideas才符合本句的意思。
58 D 此處填records,本句的意思是:通過(guò)分析數(shù)十萬(wàn)次地震波的記錄,他們認(rèn)為。其他幾個(gè)選項(xiàng)與句意不符。
59 C left:留下來(lái)的。此處的意思是:這一球體可能是地球形成時(shí)留下來(lái)的最古老的化石。
60 A 依據(jù)上下文,應(yīng)用afte~句子意思才講得通。
61 C gain:獲取。gained mass as the planet cooled:在星球變冷的過(guò)程中,它逐漸獲得了質(zhì)量。
62 B 本文主要談地球起源問(wèn)題,故此處應(yīng)填ongm.
63 A 本句前面出現(xiàn)的一個(gè)詞是tame,與之對(duì)應(yīng),應(yīng)該是radical.
64 D nickel和silicon的混合物,compound:混合物。
65 C fission-split:裂變。經(jīng)歷裂變,用動(dòng)詞experience.