下列哪项不是恶性肿瘤的生物学行为()
A.逆转
B.膨胀性生长
C.转移
D.浸润性生长
E.自主性生长
参考答案:B
(2010•东莞)如图是第30届奥运会举办地伦敦的气温曲线和降水柱状图,其气候特征是( )
A.全年高温多雨
B.全年高温干燥
C.全年温和湿润
D.全年寒冷干燥
Assuming a flat term structure of interest rates of 5 percent, the duration of a zero-coupon bond with 5 years remaining to maturity is closest to:()
A. 5.00.
B. 4.35.
C. 6.34.