. Appliances such as refrigerators, dishwashers, and vacuum cleaners # _5 Y+ ~; V1 Q2 A1 K d) _9 k
have become considerably more durable over the past 30 years. Yet their
2 f+ ]3 o1 e) z% F/ Daverage product life---the time from original sale to eventual discard---has,
: L! e' @& [3 C8 W; d+ P) ^if any thing, become shorter. Therefore, making their products more dur-
& t- @% U C# g/ h7 Y, K. o1 h- iable has been a waste of money for appliance manufacturers.
9 O6 s6 y# E7 Q2 H: L Which of the following, if true, most seriously undermines the conclusion? 2 d- |6 O v: D' U3 z- r8 E) P
AGreater product durability has essentially been a by-product of appli-
7 E( u- O* I7 W, A( O3 W ance manufacturers' efforts to make their products more efficient3 M5 H1 f" t) z
to operate. 3 V @! D) F! N' j, F8 }
B Manufacturers who stress durability in designing their appliances & y- j$ _1 x1 E8 @( a) x' x
often neglect attractive styling, though styling is the more apparent 6 K, ^0 a5 C0 P! d% E# [
feature. 2 u8 C( a. [1 G$ q- b' y- H9 q
C In advertising their products, appliance manufacturers do not mention
! r: Y: Q; Q2 e* n/ ~% _- P gains in product durability as a prime selling point.
# |5 v8 u$ e# e D Appliance manufacturers concede that even greater gains in the dur-
8 p" X1 _; G, k: ?! D ability of their products are currently within reach. 2 C/ v& q$ e6 Y2 I' Q3 _
E Appliance manufacturers do not spend their entire research budgets
/ C- W6 M/ o# G8 B6 R on efforts to increase the durability of their products.
1 A0 q& ]' q' n, i( F. |0 }& [答案A |
发表于 2012-8-15 12:40:43
