基态汞原子被激发至高能态，在去活化回到基态时，能够发射出特征波长的（）。
A、紫外光
B、可见光
C、红外光
D、荧光
参考答案：D
The following footnote appeared in Crabtree Company’ s 20×7 annual report: "On December 31, 20×7, Crabtree recognized a restructuring charge of $ 20 million, of which $ 5 million was for severance pay for employees who will be terminated in 20×8 and $15 million was for land that became permanently impaired in 20×7. " Based only on these changes, Crabtree’ s net profit margin and fixed asset turnover ratio in 20× 8 as compared to 20×7 will beNet profit margin Fixed asset turnover（）①A. Higher Higher ②B. Lower Unchanged ③C. Higher Unchanged
A. ①
B. ②
C. ③
色立体
