mofeijsmenu="
          " mofeijsmenu=mofeijsmenu+"玉米 " mofeijsmenu=mofeijsmenu+"水稻 " mofeijsmenu=mofeijsmenu+"小麦 " mofeijsmenu=mofeijsmenu+"马铃薯 " mofeijsmenu=mofeijsmenu+"园艺 " mofeijsmenu=mofeijsmenu+"其他 " document.write (mofeijsmenu)