题目

No sooner _______________ arrived at the airport _______he attracted people's attention. A . the film star had, than B . the film star had, when C . had the film star, than D . had the film star, when 答案：C一棵苹果树上能结出“国光”、“红富士”等不同品种的苹果，采用的处理技术是（ ）A．播种B．嫁接C．压条D．扦插