新GRE小短文阅读练习题五十五

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The officers of an 1845 English ship belonged to the nobility, but they
; p& r- _9 S0 H) j! n- a7 fexperienced more severe lead poisoning on an extended voyage than
9 {4 ^' T! K) ]/ Z+ @did the working-class crew.  It was discovered later that canned foods,
0 s7 q) n* o5 P! |6 b4 ybought by the crew and officers to supplement the equally distributed
dried food rations, were tainted with lead.
0 g# C2 a7 r6 l% p8 r& I# J6 uGiven the information above, which of the following, if true, would most
5 P5 `7 ?8 n# Q3 e- dcontribute to an explanation of the greater severity of lead poisoning
among the officers?
    A  Although all ship members ate the same amount of food per day,
       the crew ate all of their daily dried food rations while the officers
       substituted canned food for most of their rations.  
; }! M8 p, y( M" @) F     B The canned food produced in England in 1845 could last the dura-
) i( J% b( `- x2 C; B/ r        tion of most extended voyages without becoming inedible.  
/ @. i& k" B$ ]2 \+ Y" L: C5 S    C  On average, the officers had spent less time at sea than had the
5 L; t1 q  \: Z. f( v2 W9 q       members of the working-class crew.  
     D The population of England in 1845 got much of its drinking water
- }4 {5 S3 M" ~) F       from lead pipes that carried the water  from rivers and lakes,
       thereby contaminating the water with lead particles.  
2 \3 e2 ?3 P: A7 S- |) X! ~    E  The rate of consumption of canned foods did not increase as
7 U  ?! t( h0 b5 [       the ship's voyage continued.  
6 a! ]. ?) p+ A1 x: |' \答案A