26. Because aluminum is nonmagnetic, it is value for protecting electrical equipment from magnetic interference.
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4 h4 Q0 H5 l0 d$ `3 }0 Z答案：B
; B: ^; [+ S# R2 ~2 T; p& g3 O* B测试点：词性.
" _; c/ c5 P. H' Q$ C) \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.
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27. Nitrogen and oxygen are too important that most living organisms cannot survive without these elements.
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答案：B ( H, X0 f) l6 _; k, `5 A: K( i5 t/ s
测试点：so…that与too…to…的用法.
% c- z; }3 T6 K# L4 o. I( Q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. # j4 e% U: ^' e6 W, k! Z
1 u# j: G: O) t8 z: U- W1 p$ z
答案：C
- {9 G2 k' `4 s+ z! t测试点；时态／并列结构. " l1 {6 D7 N3 f' Y& |: P
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.
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29. Percapita income is a nation’s entire income dividing by the number of people in the nation. ( j n9 x# f Q/ r9 P( G$ M
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答案：B
2 I, Q1 |& m) B) r- |( z测试点：过去分词表示被动.
$ \( [" v5 i b* O9 H0 b6 ~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。 8 g( r! F: K+ N6 D, F B
) Z( ]; @2 j& l4 n; r, Z30. Jim Thorpe, a football, track, and baseball stars from Pennsylvania, is considered by many to be the greatest all-around athlete of modern times. * i' z5 X5 h! j# r) V
4 y1 f3 U! N& v* z& x答案：B $ u5 V& m, ?. Z4 r% H( g T
测试点；数的一致.
7 p6 f, g% N/ A2 X$ V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
