题目

下列各项措施中，用来减小有害摩擦的是（ ） A．为了防止传动带打滑，需要把皮带张紧些B．黑板上的粉笔字不容易擦干净时，双手用力按黑板擦擦黑板   C．自行车轴承中装有滚珠   D．在汽车轮胎上装防滑链   答案：CIt was in the small house ________ was destroyed by the flood ________ he spent his childhood.A．which; thatB．that; whereC．which; whereD．that; which