题目内容
（请给出正确答案）
A.修运河的目的是为了游船的通行，而不是为了驳船的通行。
B.修运河的目的不仅是为了游船的通行，也是为了驳船的通行。
C.修运河的目的不是为了游船的通行，而是为了驳船的通行。
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更多“The canals were not made to ca…”相关的问题
While【C8】______a new formula one morning, the doctor broke a test tube and gashed (划开) his finger. He was daubing (涂搽) the【C9】______with collodion (火棉胶), a coating solution of gun-cotton dissolved in ether-alcohol (乙醚),【C10】______the idea struck him —mix collodion with the nitroglycerine!【C11】______was the answer. The new mixture,【C12】______blasting gelatine (爆胶), was not only【C13】______safe to handle as dynamite, but it was also one-and-a-half times more powerful! In fact, so powerful 【C14】______ that it paved the way for a whole new【C15】______in construction and engineering. Mines were【C16】______, roads were built, and canals were cut at a speed once【C17】______impossible. It had another use, also —death and destruction in warfare. Its inventor had believed that the power of his new【C18】______ would so awe the military mind that it would actually be a deterrent (威慑物) to war.【C19】______it became a weapon that brought death to millions of soldiers and【C20】______.
【C1】
A．mixing with
B．mixed with
C．was mixing with
D．was mixed with
Despite the road improvements of the turnpike era(1790—1830), Americans continued as in colonial times to depend wherever possible on water routes for travel and transportation. The larger rivers, especially the Mississippi and the Ohio, became increasingly useful as steamboats grew in number and improved in design.
River boats carried to New Orleans the corn and other crops of northwestern farmers, the cotton and tobacco of southwestern planters. From New Orleans, ships took the cargoes on to eastern sea ports. Neither the farmers of the west nor the merchants of the east were completely satisfied with this pattern of trade. Farmers could get better prices for their crops if the alternative existed of sending them directly eastward to market, and merchants could sell larger quantities of their manufactured goods if these could be transported more directly and more economically to the west.
New waterways were needed. Sectional jealousies and constitutional scruples stood in the way of action by the federal government, and necessary expenditures were too great for private enterprise. If extensive canals were to be dug, the job would be up to the various states.
New York was the first to act. It had the natural advantage of a comparatively level route between the Hudson River and Lake Erie, through the only break in the Appalachian Mountain chain. Yet the engineering tasks were imposing. The distance was more than 350 miles, and there were ridges to cross and a wilderness of woods and swamps to penetrate. The Erie Canal, begun in 1817 and completed in 1825, was by far the greatest construction job that Americans had ever undertaken. It quickly proved a financial success as well. The prosperity of the Erie encouraged the state to enlarge its canal system by building several branches.
The range of the New York canal system was still further extended then the states of Ohio and Indiana, inspired by the success of the Erie Canal, provided water connections between Lake Erie and the Ohio River.
What does the passage suggest was the principal route for transporting crops to the east prior to 12？
A．River to road
B．Canal to river
C．River o ocean
D．Road to canal
Any attempt to describe the countryside during those centuries is prevented by two difficulties. In the first place, we have to examine the greater part of Europe's 3,750,000 square miles, and not merely the Mediterranean lands. In the second place, the inhabitants of that wide expanse refuse to fit into our standard pattern or to stand still.
In 1450, most Europeans probably lived in villages, but some regions were so hilly, lacking in good soil, or heavily timbered that villages could not keep going, and settlement was that of solitary herdsmen or shepherds. Some areas had better access to market than others and were therefore more involved in commercial agriculture than in farming. Large landowners were more likely than small landlords to run their estates and especially their domains more systematically and also to keep those records from which we learn most of what we know about the subject. Some areas had never been quite feudalized; their farmers were more free from lordship and even from landlordship. Some regions had been recently settled, and their tenants had been offered liberal terms of tenure in order to lure them into the wilderness. Finally, there was a time element; the expansion and prosperity that characterized the period from the twelfth to the fifteenth century produced or maintained conditions which were unsuitable to the stormier days preceding or the lean ones following it.
By 1350, when compared with three hundred years earlier, Europeans had, according to the passage,______
A．made several geographical discoveries
B．cut down more trees and expanded the fanning
C．made their territory 'larger
D．dug more canals to water the land
Perhaps no single phenomenon brought more widespread and lasting change to the United States society than the rise of industrialization. Industrial growth hinged on several economic factors. First, industry requires an abundance of natural resources, especially coal, iron ore, water, petroleum, and timber--all readily available on the North American continent. Second, factories demand a large labor supply. Between the 1870's and the First World War (1914-1918), approximately 23 million immigrants streamed to the United States, settled in cities, and went to work in factories and mines. They also helped build the vast network of canals and railroads that crisscrossed the continent and linked important trade centers essential to industrial growth.
Factories also offered a reprieve (暂时减轻) from the backbreaking work and financial unpredictability associated with farming. Many adults, poor and disillusioned (大失所望) with farm life, were lured to the cities by promises of steady employment, regular paychecks, increased access to goods and services, and expanded social opportunities. Others were pushed there when new technologies made their labor cheap or expendable; inventions such as steel plows and mechanized harvesters allowed one farmhand to perform. work that previously had required several, thus making farming capital-intensive rather than labor-intensive.
The United States economy underwent a massive transition and the nature of work was permanently altered. Whereas cottage industries relied on a few highly skilled craft workers who slowly and carefully converted raw materials into finished products from start to finish, factories relied on specialization. While factory work was less creative and more monotonous (单调无聊的), it was also more efficient and allowed mass production of goods at less expense.
What aspect of life in the United States does the passage mainly discuss？
A．The transition from an agricultural to an industrial economy.
B．The inventions that transformed life in the nineteenth century.
C．The problems associated with the earliest factories.
D．The difficulty of farm life in the nineteenth century,
What does the passage mainly discuss？
A．How canals are constructed.
B．Common types of canal boats and barges.
C．The world' s largest canals.
D．How canals are used and classified.
A.casual
B.elaborate
C.fruitful
D.frantic
A、channels
B、canals
C、passageway
D、corridor
The【B4】of a canal depends on the kind of boats going through it. The canal must be wide enough to permit two of the【B5】boats using it to【B6】each other easily. It must be deep enough to leave about two feet of water【B7】the keel of the largest boat using the canal.
Some canals have sloping sides, while others have sides that are nearly【B8】Canals that are cut through rock can have nearly vertical sides.【B9】, canals with earth banks may【B10】if the angle of their sides is too steep. Some canals are lined with brick, stone, or concrete to keep the water【B11】soaking into the mud. This also permits ships to go at【B12】speeds, since they cannot make the banks fall in by【B13】up the water. In small canals with mud banks, ships and barges(大平底船) must【B14】their speed.
When the canal goes【B15】different levels of water, the ships must be【B16】or lowered from one level to the other. This is generally done by【B17】of locks. If a ship wants to go up to higher water, the lower end of the lock opens to let the boat in. Then this gate closes, and the water is let into the lock chamber from the up- per level. This raised the level of the water in the lock【B18】it is the same as the upper level of water. Now the upper gates can be opened to【B19】the ship into the higher water. Some-times a canal contains a series of locks when the【B20】in levels is very great.
【B1】
A．take
B．save
C．cost
D．waste
Co-operation means ______.
A．working for others
B．working for oneself
C．working together for the interests of all
D．working together for the benefit of the whole world
A．The availability of natural resources found only in the United States.
B．The decrease in number of farms resulting from technological advances.
C．The replacement of canals and railroads by other forms of transportation.
D．The availability of a large immigrant work force.
