Cody Scott would like to screen potential equity investments to identify value stocks and selects firms that have low price-to-sales ratios. Unfortunately, screening stocks based only on this criterion may result in stocks that have poor profitability or high financial leverage, which are undesirable to Scott. Which of the following filters could be added to the stock screen to best control for poor profitability and high financial leverage Filter 1—Include only stocks with a debt-to-equity ratio that is above a certain benchmark value. Filter 2—Include only dividend paying stocks. Filter 3—Include only stocks with an assets-to-equity ratio that is below a certain benchmark value. Filter 4—Include only stocks with a positive return-on-equity.Poor profitability High financial leverage（）①A. Filter 2 Filter 3 ②B. Filter 2 Filter 1 ③C. Filter 4 Filter 3

A. ①

B. ②

C. ③

男性，24岁，心慌气短1年，心电图检查发现房颤，首先需要排除的疾病是（）

A.房间隔缺损

B.风心病二尖瓣狭窄

C.结核性心包炎

D.冠心病

E.甲状腺功能低下