A. Whirlwinds rotate in a different direction that tornadoes do. B. Tornadoes travel over land and whirlwinds over water. C. Tornadoes are larger than whirlwinds. D. Only tornadoes are funnel-shaped. 参考答案:C 答案解析:[解析] 由文中第三句话whirlwinds are atmospheric systems smaller than tornadoes可知。