A.第二种物品的需求曲线右移B.第二种物品的需求曲线左移C.第二种物品的需求量沿着该物品的需求曲线下移假如两种……

单项选择题正常货是指它的： A．价格弹性大于0 B．价格弹性小于-1 C．收入弹性大于1 D．收入弹性大于0

单项选择题假如总收入TR=300Q-30Q2，Q=5，那么，价格弹性为：（）

A.0
B.-1
C.-10
D.不确定

单项选择题Arabs will（）in a business meeting.

A．spend some time being polite and offering refreshments first
B．ask you to wait for several minutes first
C．introduce you to some strangers first
D．start talking business immediately

单项选择题完整的原型化的工具，应具有几个基本成分。以下成分：Ⅰ．集成数据字典Ⅱ．高适应性的数据库管理系Ⅲ．非过程查询语言和报告书写器Ⅳ．自动文档编辑器 Ⅴ．屏幕生成器 哪个(些)是原型化工具应该具备的?（）

A．Ⅰ和Ⅴ
B．Ⅰ和Ⅳ
C．Ⅲ和Ⅳ
D．全部

未分类题A．胸骨左缘第2肋间可闻及Ⅳ级连续性机器样杂音 B．胸骨左缘3～4肋间可闻及Ⅳ级左右收缩期杂音 C．胸骨左缘2～4肋间可闻及I、Ⅱ级左右收缩期喷射音 D．胸骨左缘2—3肋间可闻及Ⅲ级收缩期喷射音，肺动脉瓣区第二音亢进固定性分裂 E．心尖部可闻及Ⅱ级收缩期杂音动脉导管未闭

单项选择题当需求价格弹性小于1时，边际收入为： A．负值 B．正值 C．0 D．正值，但小于1

未分类题A．Its scarce proteins.B．Its terrible taste.C．Its many vitamins.D．The difficulty of finding it.

单项选择题假如Qx=20-0.5Px+0.1I-2.0Py，Py=2和Qx=10，那么x的交叉弹性为： A．-0.2 B．-0.4 C．-0.04 D．0.4

单项选择题假如Qx=20-0.5Px+0.1I-2.0Py，物品x和物品y为： A．替代品 B．互不相关 C．低档货 D．互补品

未分类题A．look upB．look downC．look awayD．lo0k back

未分类题听力原文：W: Hey! The train is late! I've been waiting her for ages.M: Which train, madam?W: The 8:18 to Baker Street.M: The 8:187 I'm afraid you've made a mistake, madam.W: A mistake? My timetable says: Baker Street train—8:18.M: Oh, no, madam. The Baker Street train leaves at 8: 08.W: At 8:08?M: You see, madam. They changed the timetable at the end of April.W: Changed it? May I see the new timetable? What does it say?M: It says: Baker Street train—8:08.W: Hm! So the train isn't late. I'm late.(13)A．Because the train was late.B．Because the train was canceled.C．Because she didn't know the timetable was changed.D．Because she was late.

单项选择题物品x的需求方程估计为：Qx=10-2Px+4I-Py，式中，I为人均收入，Py为另一物品的价格。这一方程说明： A．物品x是正常货，物品x和y不相关 B．物品x是低档货，物品x和y为互补品 C．物品x为正常货；物品x与y为互补品 D．物品x为正常货；物品x与y为替代品

单项选择题如果香港影星成龙上了意外事故保险后更多的表演高难度惊险动作，这种现象被称为( )。

单项选择题公共物品的市场需求曲线是消费者个人需求曲线的( )。 A．垂直相加 D．水平相加 C．算术平均数 D．加权平均数

单项选择题W：Don’t talk back to your parents.It’s impolite.M：But they are not reasonable.What did the woman suggest the man to do？（）

A．Suggest him not to reply impolitely to his parents.
B．Suggest him to refuse to talk to his parents.
C．Suggest him to talk his parents down.