经济学的“土豆效应”指的是在大萧条时期,土豆需求量会激增,比喻消费者舍弃高端奢侈品而转向中低端产品,并导致对后者的需求上升,进而推高低成本产品的价格。由此可见( ) ①经济越萧条低端商品利润越高 ②供求关系决定着土豆的价格 ③收入是消费的前提和基础 ④求实心理主导这一消费效应
As unemployment is very high nowadays , it’s very difficult for people to find work .
—Thank you so much for helping me with my English . — .
It is your own fault you are so tired . You oughtn’t to have stayed up so late .
The president’s speech was boring; it is ,in fact ,rather inspiring and interesting.
Whenever you are to walk on the ice , that it is solid and safe enough.