Eve r y fall, thousands of Canada geese migrate from Canada to the eastern United" D5 e1 ~& c" a( G$ L/ q& S( H
States. Recently, however, these geese have faced intense competition for food / T6 T" v E8 P% Z
from a subspecies of Canada goose that lives year-round in the eastern United 7 e% y2 _5 X4 X' |. b
States. To prevent the nonmigratory population from endangering the migratory # L9 q6 B" t$ [$ V& @5 n1 T
geese, some groups have proposed allowing hunting of the nonmigratory geese.
; I2 h6 E0 B% U; D4 U2 f& _9 u But since most hunters cannot visually distinguish the two subspecies, allowing any! A8 s: q; p- x J% j' i7 d
hunting is surely unwise. 6 R8 p% Y4 e' ?1 z, ^* G# v/ f
Which of the following, if true, most seriously weakens the argument? ; y7 f/ F% X7 V# r
A Hunting of the migratory Canada geese is permitted in some parts of Canada.
9 q/ w$ j# b* R- AB During the summer, only the nonmigratory geese are present in the eastern
$ H8 E1 _0 S; B4 u9 f6 ` United States.
3 ~# z d7 V3 k. ?0 TC The migratory Canada geese do not interbreed with the nonmigratory Canada 2 |. S- m6 ?8 x4 v% c0 F" O
geese. " \6 S# y6 q: y- V2 P+ ?
D The migratory subspecies and the nonmigratory subspecies are not the only
: ^2 \0 X1 E% M two subspecies of Canada geese. , v1 E8 @& v! n& x6 E4 F
E The groups that have proposed allowing hunting of the nonmigratory geese
4 c& l# L! g' y( z have thoroughly studied both goose populations. % E" z8 G: y& ]( Y( ^5 A
答案B |
发表于 2012-8-15 12:40:43
