-1的负倒数是______;-(-3)的相反数是______.
-1的负倒数是1;-(-3)即3的相反数是-3.
通过大量研究得知,甲、乙两地甲肝病人构成,甲地为76%,乙地为24%,则可认为()
A.甲地甲肝发病率高
B.乙地甲肝发病率高
C.甲地甲肝发病人数多于乙地
D.乙地甲肝发病人数多于甲地
E.不能进行任何比较
I was the edge of the canyon. A river was the bottom of the canyon.
A.at;on
B.on;in
C.on;at
D.in;at