陈向东的两道逻辑题，觉得有点意思，特意敲下来发给大家观摩一下,望指教

48 According to a recent cross-culture study, married people in general have longer life expectations than do people who devoice or dont remarry.This fact indicates that the stress associated with divorce adversely affects health.

Which of the following, if true, points to a weakness in the argument above?

A Overall life expectancies differ among contries, even among countries with similar cultures.

B People often show signs of a stress when undergoing a divorce

C Life expectancy varies with age-group, even among married people

D Stress of many kinds has been shown to adversely affect health

E Adults who have never married have shorter life expectancies than do married people of the same age

50 In several nineteenth century paintings the marble buildings of the Acropolis in Athens are portrayed as being reddish, but the buildings do not now appear reddish. The Marble's natural color can not have changed since the nineteenth century, so the paintings must not be showing the color of the buildings as they actually appeared. Which of the following, if true, most seriously undermines the argument above?

A The Acropolis can be clearly seen from virtually any location within the city of Athens

B Tiny plants called lichens living on marble can cause the marble to appear reddish

C Many nineteenth century artists strove for true-to-life accuracy in every detail of their paintings

D Some types of marble are naturally reddish, whereas other types are greenish or white

E Not all nineteenth century paintings of the Acropolis show the marble buildings as being reddish 

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