The percentage of children who wear glasses has increased signifi-
. c& {% x* }, Mcantly over the past thirty years. Since the methods used to diagnose
4 @' f5 [" Z. O% y& Y0 Svision impairments are the same as they were thirty years ago , the
8 |) [% U( f! l( k) T7 V3 ireason for this increase must be that a higher percentage of children
8 P6 \1 T0 _' `have poor eyesight today than thirty years ago.
! c2 _* V6 c6 g% p) |4 n, f, W In the argument given, the part that is underlined plays which of the
+ F# b5 k1 s: O; R s" ^following roles?
: `2 G! t% S" [# n! M
, q! ]# \& F2 C; n2 c5 W/ \ A Describing the circumstance that the argument seeks to explain
6 c% Q6 s2 K. c. Q3 T0 y( y6 c B Stating the position to be refuted by the argument B& e/ J1 a: P7 R0 I
C Serving as an intermediate conclusion that supports a further. _! ?8 E7 r/ ^2 j( t2 M
conclusion stated in the argument 0 D$ H* ?" o% G. n0 B
D Providing an illustrative example that neither strengthens nor
7 L! {$ t2 G$ |- S# f weakens the argument
' o/ @! `) T; F# H E Providing support for the conclusion of the argument by excluding3 i8 |( R* ]8 W( u7 Z: d# x; V+ A
an alternative explanation of the phenomenon to be explained 9 m8 Y ?4 H2 t6 ~; K5 O& j+ W
答案：C |
发表于 2012-8-15 12:40:43
