There is going to _____ a meeting this afternoon. [ ]
A. be
B. hold
C. open
D. opened
A
现定义一种新运算:“※”,使得a※b=4ab
(1)求4※7的值;
(2)求x※x+2※x-2※4=0中x的值;
(3)不论x是什么数,总有a※x=x,求a的值.
()是指个体对其整体生活状态的判断。