边际替代率
参考答案:
指如果消费者在收到额外一单位商品X之后要保持满足水平不变而必须放弃的商品Y的数量。
The Olympic flame (奥运圣火) was lit _________ March 25, 2008 in Olympia in Greece. [ ]
A. in
B. on
C. at
翻译题。
根据汉语提示,完成句子.
1. 学好英语的最好的方法就是尽可能地多说。
to study English well is speaking as often as .
2. It’s just (这么多乐趣)in Disneyland!
3. 我妈妈在这家医院当了二十多年的医生。
My mother a doctor the hospital 20 years.
4.不管你是喜欢语文还是数学,你都必须尽自己最大的努力。
you like Chinese Maths,you must .
5. 这里终年积雪。
There is snow .