630. As a construction material, bamboo is as strong assteel and sturdier than concrete. Moreover, in tropicalareas bamboo is a much less expensive constructionmaterial than either steel or concrete and is alwaysreadily available. In tropical areas, therefore, building withbamboo makes better economic sense than building withsteel or concrete, except where land values are high.' Which of the following, if true, most helps to explainthe exception noted above?
(A) Buildings constructed of bamboo are less likelyto suffer earthquake damage than are steel andconcrete buildings.
(B) Bamboo is unsuitable as a building material formultistory buildings.
(C) In order to protect it from being damaged bytermites and beetles, bamboo must be soaked,at some expense, in a preservative.
(D) In some tropical areas, bamboo is used tomake the scaffolding that is used during largeconstruction projects,
(E) Bamboo growing in an area where land valuesare increasing is often cleared to make way forconstruction.
答案是B。OG的解释是:
B Correct. Multistory buildings provide a greater area o f floor space for a given site area, and in that senseare more economical. A single-story building w ith the same floor space w ill occupy a much bigger site, sothe higher the land values, the more likely it is that a m ultistory building w ill be b uilt on that land. Thus,given this information, bamboo is less suitable for areas where land values are high.