bronchial inhalers is safe to use, the conclusion that the use of bronchial inhalers causes asthma death still holds. 如果BI是safe的,BI cause asthma death 就不holds了呀,不是都说safe了吗?
-- by 会员 cooperlee01 (2011/6/27 22:25:19)
bronchial inhalers is safe to use, the conclusion that the use of bronchial inhalers causes asthma death still holds. 如果BI是safe的,BI cause asthma death 就不holds了呀,不是都说safe了吗?
-- by 会员 cooperlee01 (2011/6/27 22:25:19)
This is a technique called NEGATION, which is specific for necessary assumptions. Read more about the negation method. Then come back and re-do this problem.
-- by 会员 sdcar2010 (2011/6/27 22:44:14)