新GRE小短文阅读练习题七十九

会计考友

Some scientists claim that a cuttlefish's eyes are incapable of
distinguishing between yellow and red, but cuttlefish can camou-
' \2 }4 `* M9 D# M  Q& h, R- c! {flage themselves by exactly matching the color scheme of their
4 t- H+ O" h+ G4 ?% ~surroundings, which often includes yellow or red or both.  Since
cuttlefish could not match the colors of their surroundings without
having some capacity to distinguish between those colors, the
scientists'  claim must be  wrong.
Which of the following is an assumption on which the argument is
based?
6 U; S! u7 q) q$ m- l     A  Yellow and red are the two most common colors in a cuttle-
: U. e; T( B2 ^, r       fish's environment.  
& I8 {3 O4 F' ~: [$ m2 ~3 F     B　 Cuttlefish never change their color except to match their
5 @+ Y0 J8 L6 H8 x2 d8 ^7 g% u       surroundings.  
) h- G5 o, n% _: g+ v8 a) [  L1 u    C　  There are never more than  two colors present in the sur-
! |& ^, {3 X: l       roundings of a cuttlefish.
$ V9 b9 ?3 p( M) _1 P$ Z   D　   Cuttlefish do not distinguish colors without using their eyes.  
    E  There are no colors that cuttlefish cannot match exactly.  
答案：D