A certain type of dinnerware made in Ganandia contains lead.1 F1 G/ ]' A9 D& j. t9 d( }
Lead can leach into acidic foods, and Ganandians tend to eat6 x( S: N9 r. j! ~
highly acidic foods. However, the extreme rarity of lead poison-6 c4 K/ K# I9 f# y1 R2 \! w6 N% X) V6 U
ing in Ganandia indicates that the dinnerware does not contain
1 t+ H6 b' J" U" d8 b Y0 bdangerous amounts of lead.
$ L, m' H- D4 o; _6 c Which of the following, if true, most seriously weakens the argu-7 f7 u, X! F9 }) i* |% m
ment above?
. G) K2 i2 l4 u6 D8 f A The dinnerware is produced exclusively for sale outside
/ {- `/ |. C! m. h* Q, ]5 p2 M Ganandia.
( o( e% @+ V+ g B Ganandian foods typically are much more acidic than
& Q3 C$ \: `1 e7 r! P& N foods anywhere else in the world. $ ]' U7 U. O m
C The only source of lead poisoning in Ganandia is lead
4 n/ x' Y! Z, u9 D that has leached into food. : p3 e4 }- w8 ~$ }0 A) X, T( D( z; I
D Most people who use the dinnerware are not aware that+ s6 l/ `/ a+ ]" U' ?8 k
it contains lead. 1 m' y9 T6 ]& w$ Y
E Acidic foods can leach lead from dinnerware even if that
3 k; \+ O* U( C# N+ r dinnerware has a protective coating.
! N0 E5 i# i" w& ], a3 o2 O. V答案A |
发表于 2012-8-15 12:40:43
