方阵的特征值为()。
A.1,2,3
B.1
C.2
D.3
参考答案:D
解析:
因为A为对角阵,故A的特征值为λ1=1,λ2=2,λ3=3。
______ too much wine has a bad effect ______ your health. [ ]
A. Drink; for
B. Drinking; in
C. Drinking; on
D. To drink; at
肝癌自发性破裂出血,无法切除时可采用()
A.三腔两囊管压迫
B.肝固有动脉结扎及胆总管引流术
C.胃大部切除术
D.肝叶切除术
E.肝固有动脉结扎术