设平面丌的方程为2x-2y+3=0,则下列说法不正确的是()。
A.平面π与xOy面的交线为
B.平面π平行于z轴
C.平面丌垂直于z轴
D.平面π的法向量为i-j
参考答案:B
小细胞肺癌最多见的病理类型是()。
A.大细胞型
B.燕麦细胞型
C.癌肉瘤
D.中间细胞型
E.混合细胞型
For which of the following securities is estimating the future cash flows least difficult()
A. 5-year, 6% bond with two years of call protection.
B. 3-year note with a coupon of Libor + 100 basis points.
C. 8% preferred stock with mandatory redemption in five years.