象征性交货(Symbolic Delivery)是指在CFR、CIF两种术语下，卖方

△ABC在平面直角坐标系中的位置如图所示，将△ABC向右平移3个单位长度后得△A₁B₁C₁，再将△A₁B₁C₁绕点O旋转180°后得到△A₂B₂C₂。

（1）作出平移后的△A₁B₁C₁；

（2）C₁的坐标为_________．=_________，B₂C=_________，∠AC₂O=_________°。

个大烧杯倒扣在桌面上，里边充以烟雾，用手电筒通过杯底自上而下照射，调节手电筒的聚光圈，使通过烟雾的光成粗细均匀的柱形光束（图-甲）：

（1）烧杯内充以烟雾，是利用了烟尘微粒对光的____________来显示光通过的路径。

（2）烧杯底上放一个凸透镜，观察到的现象如图-乙所示，说明凸透镜对光有_______________作用。

（3）烧杯底上放一个凹透镜，观察到的现象如图-丙所示，说明凹透镜对光有_____________作用。 

Questions from 36 to 40 are based on the following passage: There are a lot of “markets”. Some markets are local; you may be willing to compare prices for fruits and vegetables in a few shops in your local area, but you would be unwilling to go across the city to find out more information. Some markets are national. Many firms sell goods across the country. Some markets are global or international. Increasingly, more and more countries are involved in the world economy, whether they know about it or not.However, there are many other markets: labor markets for job seekers, supermarkets for grocery shopping, foreign exchange market, capital market, real estate markets and so on. And we must not overlook the fact that many services such as banking, insurance are also bought and sold on a worldwide scale. But what is a “market” Most people would say, “A market is a place where enough buyers and sellers meet face to face, so that a market price for goods and services can be determined.” However, with rapid growth of telecommunications, it is no longer necessary for buyers and sellers to physically meet to form a market.You may hear the terms “global market” or “global economy”. What do those terms mean to you What do they mean to business today Thanks to the Information Age we are seconds away from the rest of world. Business everywhere recognizes that they can expand their market to anywhere and do business at any time because of the Internet. Now, the Internet is the fastest growing market in the world today, yet buyers and sellers don’t even have to leave their own homes to transact business.In the modern world, a market can take many forms. Generally speaking, a market may be housed in a place, or it may exist only in people’s minds. And a market can be any place or process that brings together buyers and sellers with a view to agreeing to a price.

In the modern world, what a market can take（）

A．A market can be housed in a place.

B．A market can exist in people’s mind.

C．A market can be a place where buyers and sellers meet for bargain.

D．above all

在组织一系统水平，去脂组织中所占比例最大的部分是（）。

A.骨骼

B.骨骼肌

C.皮肤

D.神经

E.以上都不是

用于现场的0.2级安装式电能表，室内检定时，单次测量的标准偏差估计值，应不大于（）

A、0.02（COSΦ=1）0.02（COSΦ=0.5）

B、0.03（COSΦ=1）0.03（COSΦ=0.5）

C、0.04（COSΦ=1）0.04（COSΦ=0.5）