If a consumer can buy four pizzas for $24 and five pizzas for $25, then the marginal cost of the fifth pizza is:

_________ _________, making and selling pizzas might be profitable but …

A student spends all of her income on pizza and books. When pizzas cost $3 each and books cost $10 each, she consumed 30 pizzas and 3 books per month. The price of pizzas fell to $2.90 each while the price of books rose to $11 each. The price change:

—Billcaneatfour______atime.Whataboutyou?—Idon’tthinkIcan. A: hamburger B: sandwich C: dish D: pizzas

Breads, cereal and frozen pizzas currently sold in U.S. grocery stores may contain ingredients from genetically engineered plants. </p></p>

— From which country did “pizzas” originate?— [u] [/u]. 未知类型：{'label': 'questionDesc', 'content': '请选择正确答案。', 'isMemberControl': 0, 'type': 181} A: Italy B: Canada C: France D: America

Why did Dr. Pan just taste a little bit of baked meat and the broth when he was at Dr. Hyle’s home?( ) A: Because he didn’t like them. B: Because he was nearly full. C: Because he wanted to have pizzas and hamburgers. D: Because he drank too much milk.

以下哪一项不是物价水平下降的可能原因、从而有助于解释总需求曲线的倾斜?____ A: 当利率下降时,Sleepwell酒店决定建造新酒店 B: 汇率下降,因此巴黎的法国餐厅购买更多的爱荷华猪肉 C: 物价水平下降使珍妮特感觉更富有,她决定改建她的浴室 D: 物价下降而工资却由合同所固定,Millio's Frozen Pizzas决定解雇工人