A：冷暖干湿相互交替，变化周期相同
B：寒冷期较长，温暖期偏短
C：新生代以干旱为主
D：以冰期和间冰期交替出现为特点
下列句子中，语义表述正确的一句是（ ）
下列有关向日葵的叙述，错误的是（ ）
—What do you think of a house supplied by Lovell?
— you buy a home from Lovell，the company promises to buy it back at the same price after three years.
