题目

FILTON, just outside Bristol, is where Britain’s fleet of Concorde supersonic（超音速的）airliners was built. There, something remarkable is being created. Little by little a machine is “printing” a complex titanium bracket (钛合金支架), about the size of a shoe, which normally would have to be cut from a solid block of metal. Brackets are only the beginning. The researchers at Filton have a much bigger ambition: to print the entire wing of an airliner.Unrealistic as this may seem, many other people are using 3D printing technology to create similarly remarkable things. 已知f(x)是奇函数，g(x)是偶函数，且f(x)+g(x)＝x+1，则函数f(x)与g(x)的解析式分别为A.f(x)＝x2，g(x)＝-x2+x+1B.f(x)＝3x，g(x)＝-2x+1C.f(x)＝x，g(x)＝1D.f(x)＝3x2+1，g(x)＝-3x2+x