请教大家个问题

zgbjcy2008

Nursing schools cannot attract a greater number of able applicants than they currently do unless the problems of low wages and high-stress working conditions in the nursing profession are solved. If the pool of able applicants to nursing school does not increase beyond the current level, either the profession will have to lower its entrance standards, or there will soon be an acute shortage of nurses. It is not certain, however, that lowering entrance standards will avert a shortage. It is clear that with either a shortage of nurses or lowered entrance standards of the profession, the current high quality of health care cannot be maintained.

Which one of the following can be property inferred from the passage?

(A) If the nursing profession solves the problems of low wages and high-stress working conditions, it will attract able applicants in greater numbers than it currently does.

(B) The nursing profession will have to lower its entrance standards if the pool of able applicants to nursing school does not increase beyond the current level.

(C) If the nursing profession solves the problems of low wages and high-stress working conditions, high quality health care will be maintained.

(D) If the nursing profession fails to solve the problems of low wages and high-stress working conditions, there will soon be an acute shortage of nurses

(E) The current high quality of health care will not be maintained if the problems of low wages and high-stress working conditions in the nursing profession are not solved.

答案是E，请问D为什么不对

喝咖啡的狼

简而言之，黄色背景后面那句话是关键，注意 EITHER .. OR .. ，也就是由于the problems of low wages and high-stress working conditions 推出两种可能后果。1.是降低录用门槛，2是护士短缺 ；再由后面那句 “It is not certain, however, that lowering entrance standards will avert a shortage. ”得出门槛降低对于护士的短缺的改善不能确定，所以 答案D 具有不确定性，是大大的陷阱。而这两种后果都能导致医疗质量下降的最终结果，所以答案E是“IT IS CLEAR ”的

zgbjcy2008

If the nursing profession fails to solve the problems of low wages and high-stress working conditions将会导致护士短缺或者降低门槛，如果降低了门槛，护士不一定短缺。但是无论护士短缺还是降低门槛都会导致医疗水平无法保持

ivyqxx

呵呵，觉得这道题是充分必要条件一个很好的例子呢，正好复习了一边相关概念。