[单项选择]What do National Semiconductor, Maxwell House Coffee, Deloitte & Touche, and Hearst Magazines have in common All these organizations are (47) by women. Moreover, according to a recent study by Catalyst, a national nonprofit organization (48) women in business, more than 80 percent of Fortune 500 companies have at least one woman on their boards of directors, up from 69 percent two years earlier. Despite all this, there is (49) that women are not commonly found at the executive level. No Fortune-500 company has a female CEO; women executives are (50) underrepresented in some industries, such as manufacturing, engineering, and financial services; and responses to the Catalyst survey show that six in ten women believe women suffer discrimination (歧视) in (51) executive business positions. Industry experts have pointed out several blocks to women’’s (52) up the corporate ladder. Among these blocks are the prejudiced (53) of women that some men in managerial positions still