题目

三个数72,120,168的最大公约数是____________. 答案：解析：利用辗转相除法：120=72×1+48,72=48×1+24,48=24×2,168=24×7.答案：248．听第7段材料，回答第8、9题．8．How much sunlight does the plant need？A．A lot．B．Just a little．C．None at all．9．What does the woman think of the plant？A．It's very expensive．B．It's too difficult to keep alive．C．It's beautiful and perfect．