题目

Music Opera at Music Hall: 1243 Elm Street. The season runs June through August, with additional performances in March and September. The Opera honors Enjoy the Arts membership discounts. Phone: 241-2742. http://www.cityopera.com. Chamber Orchestra: The Orchestra plays at Memorial Hall at 1406 Elm Street, which offers several concerts from March through June. Call 723-1182 for more information. http: //www.chamberorch.com. Symphony Orchestra: At Music Hall and Riverbend. For ticket sales, call 381-3300. Regular season runs September through May at Music Hall in summer at Riverbend. ht设Q为有理数集，函数f（x）=，g（x）=，则函数h（x）=f（x）·g（x） [     ]A．是奇函数但不是偶函数         B．是偶函数但不是奇函数C．既是奇函数也是偶函数         D．既不是偶函数也不是奇函数