阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从
4个选项中选择1个最佳答案，涂在答题卡相应的位置上。
Earth’s Inner Core
Scientists have long struggled to understand what lies at the planet’s center, Direct
observation of its center is impossible，so researchers must_____(51)to other evidence．
  In 1889，a German scientist detected a severe earthquake in Japan．Geophysicists concluded
that shock waves_____(52)jolts(晃动)from one side of Earth through the center to the
other side．Then in 1936，Danish geophysicist Inge Lehmann studied the waves______(53)
to determine that within Earth’s core of molten(熔化了的)iron lies a solid inner core-but_____
(54)that core was made of eluded(难倒)her．Other geophysicists quickly
determined that Lehmann’s inner core was composed mostly_____(55)iron. Since then，
Lehmann’s discovery has_____(56)conventional Earth science．
  But now scientists are challenging traditional theory with new and radical _____(57)
For example，Earth’s center could actually contain an“inner core within the inner core，claim Ishii and colleague Adam Dziewonski．
Analyzing hundreds of thousands of earthquake wave _____(58),they maintain that the inner core has at its heart a tiny, even more solid sphere(球体) . This sphere‘‘may be the oldest fossil____(59)from the formation of Earth，”says Dziewonski．
Dziewonski and Ishii speculate that shortly_____(60)  Earth formed around 4.8billion years ago，a giant asteroid(小行星)smashed into the young planet and nearly melted it. But Earth’s center didn’t quite melt；it______(61)mass as the planet cooled.  The core within a core may be the kernel(核心)that endured．“Its presence could change our basic ideas about the_____ (62)of the planet，”Dziewonski says idea is tame(温和的)compared to the_____(63)theories of independent geophysicist J．Marvin Herndon．Earth’s inner core is made not of iron，he claims
but a_____(64)of nickel and silicon Hemdon has a truly revolutionary notion：Within the nickel silicide(硅化物)inner core is also an“inner”inner core—an 8 km—wide ball of the element uranium．Uranium is radioactive．Hemdon thinks the uranium releases heat energy as its atoms_____(65)fission-split and crash into another in a chain reaction. In other words,we may live on top of a gigantic, “natural”nuclear 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
 
2005年职称英语等级考试理工类(A级)答案
满分100分，其中
1一15每题1分；
16—30每题1分；
31—45每题3分0
46—50每题2分0
51—65每题i分。
1．A    2．C    3．C    4．D    5．B
6．A    7．A    8．B    9．D   10．B
11．D   12 A    13．C    14．B   15．A
16．A   17．C   18．A   19．C   20．A
21．B   22．B   23．D   24．A   25．E
26．B   27．C   28．F   29．D   30．B
31．D   32．A   33．C   34．B   35．D
36．A   37．C   38．D   39．B   40 C
41．B   42．C   43．D   44．A   45．C
46．E   47．D   48．A   49．F   50．C
51．C   52．A   53．D   54．B   55．C
56．B   57．A   58．D   59．C   60．A
61．C   62．B   63．A   64．D   65．C

2005年职称英语等级考试
  理工类(A级)题解
第】部分·词汇选项
    1  A  motive：动机。reason：理由。这两个词意思比较接近。There is no reason to
    doubt his word，没有理由不相信他的话。excuse：借口，  answer和reply都有“回
    答”的意思。
    2 C  widen和broaden都有“拓宽”的意思。twist：弯曲。stretch：延伸。The forests
    Stretch for hundreds of miles．森林绵延数百英里。bend：弯曲。
    3  C lure：吸引。temptation：吸引。这两个词意思相近。abuse：滥用。flavor：滋
    味；consumption：消费。
    4 D  immense和enormous都有“巨大的”的意思。  it was an enormous
    disappointment此事太令人失望了。natural：自然的；tiny：微小的：fatal：致命的。
    5  B  remedy：补救。improve：改进。这两个词意思相近。Herbal medicine can be used
    to improve our health．草药可用于增进我们的健康。maintain：保持。protect：保护。assess：评估。
  6 A  collaborate：合作；勾结。cooperate：合作。  She has agreed to cooperate with
    the police in the investigation．她同意在调查中跟警察台作。compete：比赛。combine：
    合并。argue：争论。
  7 A  consolidate：巩固。strengthen：巩固，加强。To strengthen his position in
    Parliament，he held talks with leaders of the Peasant Party，为了加强在国会中的地位，
    他跟农民党的领导人进行了会谈。control：控制。abandon：放弃。exercise：行使。
    8 B probe：探索。explore：探索。这两个词意思很相近。Both parties are exploring
    ways of settling the dispute．双方都在寻求解决争端的办法。solve：解决。settle：解
    决。handle：处理。
    9 D  alleviate：减轻。relieve：减轻：变小。remove：去掉；切除。cure：治疗。
    worsen：严重。
    10 B defect：缺陷。fault：缺陷。function：功能。motion：意向。part：部分。
    11 D  insufficient：不充分的。inadequate：不充分的。Supplies of food and medicine
    are inadequate食物和药品供应不足。instant：迫切的。infinite：无限的。
    12 A perish：死亡。die：死亡。The old man will die soon．这个老人很快会死去。suffer：
    蒙受。float：漂浮。scatter：散乱。
  13 C  inthe end：最后。ultimately：最后。The food ultimately arrived at the end of last
    month．食品终于在上月末运到了。certainly：当然。necessarily：必定地。

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