A certain type of dinnerware made in Ganandia contains lead.
6 Y9 i8 Z& ~2 N/ x$ U4 W, g: LLead can leach into acidic foods, and Ganandians tend to eat
- \( Z0 e3 K5 v, P! P9 G7 h. \highly acidic foods. However, the extreme rarity of lead poison-
& \( {; i- {6 {% p6 R0 [ing in Ganandia indicates that the dinnerware does not contain+ i4 I4 R3 ^& {2 I D' G
dangerous amounts of lead.7 p' _" K+ y8 c8 \& o8 @
Which of the following, if true, most seriously weakens the argu-
; [$ v0 Z3 z+ o1 U+ Iment above?3 W6 I5 A0 s% Z2 j$ i1 h0 g! q. d
The dinnerware is produced exclusively for sale outside
; g) w/ E% d/ n! j/ u Ganandia.
8 o7 C! W* u' E Ganandian foods typically are much more acidic than5 P6 ^- M, j& E* d( R% X& o
foods anywhere else in the world.
. [0 `4 ]1 u# N, N l1 ] The only source of lead poisoning in Ganandia is lead% J, ]- `& I, F. O$ p& t7 w
that has leached into food. ! }5 D! Q! K! ^. y
Most people who use the dinnerware are not aware that0 c, S% M; I7 C
it contains lead. - u4 M$ _$ ]. h$ `* m
Acidic foods can leach lead from dinnerware even if that5 l" c9 d: L$ }
dinnerware has a protective coating. , P( E' |7 g5 Q& X
答案 A |
发表于 2012-8-15 12:40:43
