题目内容
（请给出正确答案）
A. The reason is due to ().
B.lexical context
C.grammatical context
D.cultural background
E.linguistic context
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更多“"trade union" has different in…”相关的问题
A.to set up a special committee
B.setting up a special committee
C.having set up a special committee
D.to set up a committee special
在习题1的基础上加入外国，其需求曲线为： D*= 80-20P，供给曲线为： S* =40+20P。
a.推导并绘出外国的出口供给曲线，同时计算没有贸易时外国的小麦价格。
b.如果本国和外国进行贸易，且运输成本为零。计算自由贸易时的均衡点，与之对应的世界价格是多少？贸易量又是多大？
Now add Foreign， which has a demand curve
D*=80-20P
and a supply curve
S*=40+20P
a. Derive and graph Foreign's export supply curve and find the price of wheat that would prevail in Foreign in the absence of trade.
b. Now allow Foreign and Home to trade with each other， at zero transportation cost. Find the equilibrium under free trade. What is the world price？ What is the volume of trade？
When the Nanking Massacre occurred,Fitch ()
A、was in Shanghai
B、saw the crime with his own eyes
C、became the first person able to leave Nanking
D、was able to let the world know about the event immediately
Historian John Keegan writes: “Nuclear weapons have, since August 9, 1945, killed no one. The 50,000,000 who have died in war since that date have for the most part, been killed by cheap, mass-produced weapons and small ammunition, costing little more than the transistor radios which have flooded the world in the same period. Because small weapons have disrupted life very little in the advanced world, outside the restricted localities where drug-dealing and political terrorism flourish, the populations of the rich states have been slow to recognize the horror that this pollution has brought in its train.
Why have small arms become the weapons of choice in recent wars？ Part of the reason lies in the relationship between conflict and poverty. Most of the wars fought during the 1990s took place in countries that are poor----too poor to buy sophisticated weapon systems. Small arms and light weapons are a bargain. For example, 50 million dollars, which is approximately the cost of a single modern jet fighter, can equip an army with 200,000 assault rifles.
Another reason why small weapons are so popular is that they are lethal. A single rapid-fire assault rifle can fire hundreds of rounds a minute. They are also easy to use and maintain. A child of ten can be taught to strip and reassemble a typical assault rifle. A child can also quickly learn to aim and fire that rifle into a crowd of people.
The global traffic in guns is complex. The illegal trade of small arms is big. In some African wars, paramilitary groups have bought billions of dollars’ worth of small arms and light weapons, not with money, but with diamonds seized from diamond-mining areas.
Weapons are also linked to the illegal trade in drugs. It is not unusual for criminal organizations to use the same routes to smuggle drugs in one direction and to smuggle guns in the other.
11. It is implied in the passage that _____.
A、the nuclear arms-control talks can never reach an agreement
B、small arms-control is more important than nuclear arms-control
C、the power of nuclear weapons to kill people has been diminished
D、unclear weapons were the topic of arms-control talks 50 years ago
12. The advanced world neglect the problems of small arms because ____.
A、They have to deal with drug-dealing and political terrorism.
B、They have no such problems as are caused by small weapons.
C、They face other more important problems such as pollution.
D、They have not recognized the seriousness of the problems in time.
13. Which of the following is NOT mentioned as the reason for the prevalence of small arms？
A、Small arms are cheap.
B、Small arms are powerful.
C、Small arms are easier to use.
D、Small arms are easier to get.
14. We can conclude from the passage that _____.
A、small arms are not expensive in the black-market
B、it is unfair to exchange small arms for diamond
C、criminals use the same passage to smuggle drugs and small arms
D、where there are drugs, there are small arms
15. The best title for this passage is _____.
A、Small Arms Talks, Not Nuclear Arms Talks.
B、Neglect of Small Arms Control.
C、Global Traffic in Small Arms.
D、Small Arms, Big Problems.
tacks from other tribes or perhaps because of severe climatic changes that undermined agriculture.To the west another culture，based on intensive agriculture，was beginning to flourish.Its center was beneath
present-day St.Louis，and it radiated out to encompass most of the Mississippi watershed，from Wisconsin to Louisians and from Oklahoma to Tennessee.Thousands of villages were included in its orbit.By about AD.700 this Mississippian culture，as is known to archaeologists，began to send its influence eastward to transform. the life of most of the less technologically advanced woodland tribes.Like the Mound Builders of the
Ohio region，these tribes，probably influenced by Meso-American cultures through trade and warfare，built gigantic mounds as burial and ceremonial places.The largest of them，rising In four terraces to a height of one hundred feet，has a rectangular base of nearly fifteen acres，larger than that of the Great Pyramid of Egypt.Built between AD.900 and 1100 this huge earthwork faces the site of a palisaded (用栅围护) Indian city which contained more than one hundred small artificial mounds marking burial sites.Spread among them was a vast settlement containing some 30 000 people by current estimations.The finely crafted ornaments and tools recovered at Cahokia，as this center of Misissippi culture is called，
include elaborate ceramics (陶器) finely sculpted stonework，carefully embossed and engraved copper and mica (云母) sheets，and one funeral blanket fashioned from 12 000 shell beads.They indicate that Cahokia was a true urban center，with clustered housing，markets，and specialists in toolmaking，hide-dressing，potting，jewelry-making，weaving，and salt-making.
1.What is the main topic of the passage？()
A.The Mississippian culture
B.The decline of Mound Builder culture
C.The architecture of Meso-American Indians
D.the eastern woodlands tribes.
2.The paragraph preceding this one most probably discussed.()
A.the Mound Builder culture
B.warfare in AD.500
C.the geography of the Mississippi area
D.agriculture near the Mississippi River
3.In relation to the Mississippian culture，the Mound Builder culture was located().
A.in essentially the same area
B.farther south along the watershed
C.to the east
D.to the west
4.The Mississippian culture influenced the culture of the().
A.eastern woodland tribes
B.Mound Builders
C.Meso-Americans
D.Egyptians
5.According to the passage，the mounds were used as().
A.palaces for the royal families
B.fortresses for defense
C.centers for conducting trade
D.places for burying the dead
n(8，9)，Union(1，8)，Union(3，10)，Union(3，11)，Union(3，12)，Union(3，13)，Union(14，15)，Union(16，17)，Union(14，16)，Union(1，3)，Union(1，14)，要求：
(1)以任意方式执行Union;
(2)根据树的高度执行Union;
(3)根据树中结点个数执行Union。
