颌下腺炎常见的原因是()
A.牙槽脓肿
B.淋巴结炎
C.结石阻塞导管
D.冠周炎
E.血源性感染
参考答案:C
The mean monthly return on U.S. Treasury bills ( T - bills) is 0.42 percent. The mean monthly return for an index of small stocks is 4.56 percent, with a standard deviation of 3.56 percent. What is the Sharpe measure for the index of small stocks()
A. 10.60%.
B. 16.56%.
C. 1.16%.
税负转嫁最基本的条件是()。
A、商品价格由供求关系决定的自由浮动
B、供求弹性大
C、税种的不同
D、课税范围宽