问题
单项选择题
一50岁男性全冠修复后3个月，患牙出现甜、酸刺激痛，X线片未见异常。其原因不可能是（）
A.创伤性咬合
B.继发龋
C.牙龈退缩
D.粘固剂脱落
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
一50岁男性全冠修复后3个月，患牙出现甜、酸刺激痛，X线片未见异常。其原因不可能是（）
A.创伤性咬合
B.继发龋
C.牙龈退缩
D.粘固剂脱落
参考答案：A
Three firms in the same industry show the following ratios for the most recent year after all proper adjustments have been made for dilutive securities and differences in financial reporting standards :
| Earnings per Share | Sales per Share | Operating Cash Flow per Share | |
| Company X | $ 1.50 | $ 2.50 | $ 1.00 |
| Company Y | $ 3.50 | $ 1.00 | $ 2.00 |
| Company Z | $ 2.00 | $1.50 | $ 3.00 |
A. is Company X because it has the greatest sales per share.
B. is Company Y because it has the highest earnings per share.
C. cannot be deten’nined because per-share ratios are not comparable.