16. Porcelain is not a single clay, and a compound of kaolin, ball clay, feldspar, and silica.
) i0 ~8 l, Q2 H# ]5 s
3 A W* X6 I0 n, }; W0 |答案：C
( f, m# C+ G" F4 ~8 F测试点；not…but…用法.
( ?% t4 i; x( }! I0 n6 I c分析：看到not…，应想到后文有表示转折关系的but与之连用，不能用表示并列关系的and连接. 6 L% i- c- _* |# ^
% j- N7 r7 f# r& S! y17. The bison, know for the hump over its shoulders, is usually called a buffalo in North America. / M: ]0 o- B7 q+ {& K, L
- s" v4 z1 u, X/ f6 F- t答案：A 7 p* _) W) a8 H6 V& y6 U
测试点：词形
7 X4 E+ B' r; h/ L9 q分析：分词短语作后置定语．know是动词原形，而修饰主语应当用分词应为known.
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/ J. R- B% o. {6 s5 q2 \18. Perspiration, the body’s built-in cooling mechanism occurs as a natural reaction to nervousness, intense heat, or vigorously exercise. - {# \$ p$ E+ N' T# U
1 X) U/ G, _. y: I4 T2 ~; g
答案：D ! d/ d+ V) q" ~
测试点：词性／并列结构. ! B0 Q" y* z; v* e) b6 \
分析：连词or两边的成份应同词性、同性质，故exercise应与nervousness和heat一样，是名词而非动词。修饰名词应当用形容词vigorous，不用副词vigorously。 : p9 c! w& K+ i3 o) e% k4 @. l9 q9 p
解题要点；遇到划线的-ly结尾的副词时，应首先考虑它是否与其形容词形式错用. * P% G4 K* S& T: q
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19. Because of the rising cost of fuel, scientists are building automobile engines who will conserve gasoline but still run smoothly.
4 `6 _) T4 J% D
8 J3 S0 `- N. R9 L) k+ {答案：D
7 }8 O$ t6 Q, l* l, z9 Y3 w7 [测试点：who和which的用法. y; i% i2 ~" H
分析：定语从句修饰的engines是物而不是人，作为从句主语的关系词不能用who,而应为that或which.
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20. The primary function of a sonometer is to calculate and demonstrate the relations mathematical of melodious tones. 9 \: ^ T( {' g2 ~4 \
8 w& \1 e, {: t" x4 Z5 m答案：C $ |: a9 V$ _4 x/ U) M8 h
测试点：词序.
2 s5 Y/ K$ x" T+ U0 [2 ?0 d分析：单个的形容词修饰名词时，应放在名词前面．应为mathematical relations.
! J' T2 G5 y0 o F解题要点；形容词(定语) +名词这一结构的词序颠倒是TOEFL常考题型。 |
发表于 2012-8-14 22:34:35
