在市场经济中，( )作为宏观经济的管理者和社会经济生活中的调节者，主要是对市场失灵

一个凸多边形的内角和是其外角和的2倍，则这个多边形是______边形．

托运人将以下所附航空货运单传真给国际货运代理人，并咨询关于货物运输的下列事宜，请你作为国际货运代理人的操作人员，给予答复(请用中文答复)。ORIGINAL 3 (FOR SHIPPER)

该票货物的目的站机场

IS THERE LIFE ON EARTH

There was great excitement on the planet of Venus(金星) this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs ever since.

The satellite was directed into an area known as Manhattan (named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20 000 light years ago).Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information as to feasibility(可行性) of a manned flying saucer(飞碟) landing on Earth.A press conference was held at the Venus Institute of Technology.

“We have come to the conclusion,based on last week's satellite landing,” Pro. Zog said,“that there is no life on the Earth.”

“How do you know this?” the science reporter of the Venus Evening Star asked. 

“For one thing, Earth's surface in the area of Manhattan is composed of solid concrete(混凝土)and nothing can grow there. For another, the atmosphere is filled with carbon monoxide(一氧化碳) and other deadly gases and nobody could possibly breathe this air and survive.”

“What does this mean as far as our flying saucer program is concerned?”

“We shall have to take our own oxygen with us, which means a much heavier flying saucer than we originally planned. ”

“Are there any other hazards that you discovered in your studies?”

“Take a look at this photo. You see this dark cloud floating over the surface of Earth? We call this the Consolidated Edison Belt. We don't know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there.”

“If what you say is true, won't this set back the flying saucer program several years?”

“Yes, but we shall proceed as soon as the Grubstart gives us the added funds.”

“Prof. Zog, why are we spending billions and billions of zilches to land a flying saucer on Earth when there is no life there?”

“Because if we Venusians can learn to breathe in an Earth atmosphere, then we can live anywhere.”

小题1:During the week of great excitement the Venusian scientists succeeded in getting important information on whether they can_______.

A．land a satellite with Venus astronauts on Earth

B．make a firstrate flying saucer

C．get a Earth Being to Venus

D．direct a flying saucer into Manhattan小题2:According to Prof.Zog,the Venusians will have to take their own oxygen with them when they carry out their flying saucer program because_______.

A．they need it on their way to the planet of Earth

B．the Earth's atmosphere is filled with deadly gases

C．oxygen is far from enough in the area of Manhattan where the saucer is to land

D．there is no air on the planet of Earth小题3:The “dark black cloud” on the photograph refers to_______.

A．the polluted air floating over the surface of Earth

B．the mass of tiny drops of water floating above Earth

C．the things that are unknown to everybody

D．the dark clouds gathering before a storm breaks小题4:The author wishes to call our attention to the fact_______.

A．that modern man has polluted his environment to such an extent that he might destroy himself if he went on like this

B．that there is no point in spending billions and billions of zilches to land a flying saucer on Earth

C．that pollution has become so serious a problem on Earth that even Venusians find life there unbearable

D．that it is difficult, if not altogether impossible, to land a manned flying saucer on Earth

在我国，自西汉到明末，对外国人基本上采取( )

A．特权制度

B．排外制度

C．平等待遇制度

D．合理待遇制度

铁心线圈的铁损与（）成正比。

A、电压

B、电流

C、电压的平方

D、电流的平方