26. Because aluminum is nonmagnetic, it is value for protecting electrical equipment from magnetic interference. ) o) K4 z0 h0 b. H* o
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答案：B
/ a* R/ T: o6 n6 k, u0 }& x测试点：词性. 9 Z' U, U: u0 R# `3 s
分析：value这个词，以及与之有关的各种形式，常常出现在考题中．此处应用其形容词valuable作表语. . o6 v, U. B/ ?' a- P
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27. Nitrogen and oxygen are too important that most living organisms cannot survive without these elements. ' H7 O& C8 z3 C7 |
( K. H; r! f! t& k9 d" G答案：B
# d, e7 X \7 d测试点：so…that与too…to…的用法.
) m0 Z- q: w' J) Q' M# _: W分析：这两个结构常被错误搭配．看到后文无to而有that，应知此处too应为so。
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28. Coal and petroleum resulted when plants become buried in swamps and decayed. : ]" J. M$ E4 m7 n T x
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答案：C * X% v* U. W' f% V4 d
测试点；时态／并列结构.
2 K' D- I6 j9 I, k0 i分析：主句为过去时(resulted)，时间状语从句不能用现在时．and连接两个并列的谓语部分，其一边为过去时的decayed,另一边也应是过去时的动词．应为became．亦可从句意方面分析；煤和石油的成因是远古时期的事情，不应用现在时. J4 {4 o7 m. [. ]& f
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29. Percapita income is a nation’s entire income dividing by the number of people in the nation.
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答案：B - r, ?6 k: q8 |3 ~0 R9 [9 u
测试点：过去分词表示被动. & D% w2 i, q0 S8 R
分析：接在名词后面作定语时，divided by是固定的短语，相当于省略的从句(that／which is)divided by"：这里应用过去分词表示被动的意思。
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4 E8 Z5 y$ x- ^$ ^* d" ]0 b30. Jim Thorpe, a football, track, and baseball stars from Pennsylvania, is considered by many to be the greatest all-around athlete of modern times. * i7 @4 Q' u f8 A( q, k C w
8 H- O5 v h9 z1 Y, E/ l4 Y答案：B
7 ^" p2 o) _5 H k2 \+ S测试点；数的一致.
5 R) j' h) f! C: P& H! d分析：冠词a后应是单数名词．另外，此处的成分为主语的同位语t主语为单数，其同位语也应是单数的star. |
发表于 2012-8-14 22:34:35
