下列哪项不是ARDS初期的临床表现（）

A.呼吸加快

B.呼吸窘迫感，用一般的吸氧法不能得以缓解

C.呼吸道分泌物增多，肺部有啰音

D.X线胸片一般无明显异常

E.PaO降至8.0kPa（60mmHg）

A firm has an expected dividend payout ratio of 48 percent and an expected future growth rate of 8 percent. What should the firm's price to earnings ratio (P/E) be if the required rate of return on stocks of this type is 14 percent and what is the retention ratio of the firm
P/E ratio Retention ratio（）
①A. 6.5 48%
②B. 8.0 52%
③C. 8.0 48%

A. ①

B. ②

C. ③