LAO45度平面心肌灌注显像，可显示左室哪几个心肌节段（）
A.后侧壁
B.前侧壁
C.心尖
D.下壁
E.间隔
参考答案：A, C, D, E
设集合A={x|x2-ax-2=0}，B={x|x2+bx+c=0}，且A∩B={-2}，A∪B={-2，1，5}，求a，b，c的值．
—I hope you’ll have a good journey.
— .
A．Well done
B．Don’t mention it
C．Certainly
D．Thank you very much
