假定某消费者的效用函数为 U=XY ,商品 X 、 Y 的价格分别为 P X =P Y =2 元,收入 m=40 元。 ( 1 )该消费者的均衡购买量是多少?最大的效用是多少? ( 2 )若 P Y 降为 1 元,替代效应使其购买两种商品的数量变为多少?收入效应使其购买量变为多少?(上海大学 2006 年)
【单选题】I still love the wilderness, and I can’t wait for my next trip to the backcountry — to walk for miles without crossing a road, without fielding a call or an email or a tweet. To once again drink deepl...
【单选题】Read the sentences carefully and choose the one in which the underlined word has the same meaning as in the sentence quoted from the passage. "Body language” is a term used to describe facial expressi...
A.
The main exams are at the end of the summer term .
B.
He used several technical terms which I didn't understand.
【单选题】People were snapping photos and sending texts; one woman was even making calls. We sniffed at the jibber-jabberers, walked down to the trailhead, and hitchhiked back into Yosemite, where our car was p...
【单选题】Read the sentences carefully and choose the one in which the underlined word has the same meaning as in the sentence quoted from the passage. In Asia, the sign is a wave of the hand... (Para.4)
A.
At night, I listened to the sound of the waves crashing against the shore.
B.
Give Grandpa a wave, Alice. You won't see him for a while.