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
— Look! Here _____. — Oh, yes, here _____.
All substances, _____ solid, liquids or gases, are made up of entirely atoms.
----_____ you or he the teacher of English? ----Neither my sister nor my mother present at the meeting.
____ you may be right , I can’t agree completely.
____ that they are inexperienced, they have done a good job.