口腔癌好发于
A．口腔粘膜
B．颌骨组织
C．腮腺组织
D．颌下腺组织
E．面部皮肤
参考答案：A
动作发育的顺序是（）
A.抬头→抬胸→坐起→站立
B.抬胸→抬头→坐起→站立
C.抬头→坐起→抬胸→站立
D.抬头→站立→抬胸→坐起
E.坐起→抬胸→抬头→站立
John Cupp, CFA, has several hundred clients. The values of the portfolios Cupp manages are approximately normally distributed with a mean of $ 800000 and a standard deviation of $ 250000. The probability of a randomly selected portfolio being in excess of $1000000 is :（）
A. 0.3773.
B. 0.6227.
C. 0.2119.
