2023年职称英语考试理工类A级完形填空试题1

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2023年职称英语考试理工类A级完形填空试题1

  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 corean 8 kmwide 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

  

  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 corean 8 kmwide 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

  

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