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During ZXCTN product emergency fault handling, make sure to follow the rule of restore
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A.Protection lock
B.Protection signal invalidatio
C.Forced switching
D.Working signal invalidatio
A.prime
B.golden
Human migrations (迁移) within recorded history have transformed the entire character of lands and continents and the composition of their racial, ethnic and language groups. The map of Europe, for example, is the product of several major early migrations involving the Germanic peoples, the Slaves, and the Turks. The overseas migration of Europeans during this period totaled about 60 million people.
The largest migration in history has been called the Great Atlantic Migration from Europe to North America, the first major wave of which began in the 1840's with mass movements from Ireland and Germany. In the 1880's, a second and larger wave developed from eastern and southern Europe; between 1880 and 1910 some 17 million Europeans entered the United States. The total number of Europeans reaching tile United States amounted to 37 million between 1820 and 1980. From 1801 to 1914 about 7.5 million people moved from Europe to Asiatic Russia, and between World War I and II about 6 million more chose to move there, not counting the vast number of deportees (被遗返回国者) who were forced to go to Siberia's labor camps. Since World War Ⅱ the largest migrations have involved groups from developing countries moving to the industrialized nations. Some 13 million people moved across borders to become permanent residents of Western Europe from the 1960's through the 1980's, and more than 10 million permanent immigrants were admitted Legally to the United States in that same period, with illegal immigration adding several millions more.
Slave migrations and mass expulsions (排斥) also have been part of human history for thousands of years. The largest slave migrations were probably those compelled by European slave traders operating in Africa from the 16th to the 19th century; perhaps 20 million slaves were taken to the America, though a large number died in terrible conditions of the trip across the Atlantic Ocean. The largest mass expulsions have probably been those imposed by Nazi Germany, which deported 7 to 8 million persons during World War Ⅱ. The major trend in internal migration during the 20th century has been the movement from rural to urban areas. As a consequence, urban growth since World War II has been very rapid in much of the world, particularly in developing countries.
What is the main idea of the passage？
A．The map of Europe is the product of several major early migrations.
B．Human migrations within recorded history have changed the world.
C．The overseas migration of Europeans totaled about 60 million people.
D．The first major wave of migration began in the 1840's.
Almost every new innovation goes through three phases. When
initially introducing into the market, the process of adoption is slow. S1.______
The early models are expensive and hard to use, and perhaps even unsafe.
The economic impact is relatively great. S2.______
The second phase is the explosive one, where the innovation was S3.______
rapidly adopted by a large number of people. It gets cheaper and easier
to use and becomes something familiar. And then in the third stage, diffusion
of the innovation slows down again, as if it permeates out across the S4.______
economy. During the explosive phase, the whole new industries
spring up to produce the new product or innovation, but to service it. S5.______
For example, during the 1920s, there was a dramatic acceleration in auto
production, from 1.9 million in 1920 to 4.5 million in 1929. This boom was
accompanying by all sorts of other essential activities necessary for S6.______
auto-based nation: Roads had to be built for the cars to run on; refineries and S7.______
oil wells, to provide the gasoline; and garages, to repair it. Historically, the S8.______
same pattern is repeated again and again with innovations. The construction
of the electrical system requested an enormous early investment in generation S9.______
and distribution capacity. The introduction of the radio was followed by a buying
spree(无节制的狂热行为) by Americans what quickly brought radios into S10.______
almost half of all households by 1930, up from nearly none in 1924.
【S1】
听力原文： "High tech "and "state of the art" are two expressions that describe very modern technology. High tech is just a shorter way of saying high technology. And high technology describes any invention, system or device that uses the newest ideas or discoveries of science and engineering.
What is high tech？ A computer is high tech. So is a communications satellite. A modern manufacturing system is surely high tech.
High tech became a popular expression in the United States during the early 1980's. Because of improvements in technology, people could buy many new kinds of products in American stores, such as home computers, microwave ovens, etc.
"State of the art" is something that is as modern as possible. It is a product that is based on the very latest methods and technology. Something that is "state of the art" means the newest possible design or product of a business or industry. A state of the art television set, for example, uses the most modern electronic design and parts. It is the best that one can buy.
"State of the art" is not a new expression. Engineers have used it for years, to describe the best and most modern way of doing something.
Millions of Americans began to use the expression in the late 1970's. The reason was the computer revolution. Every computer company claimed that its computers were "state of the art".
Computer technology changed so fast that a state of the art computer today might be old tomorrow. The expression "state of the art" became as common and popular as computers themselves. Now all kinds of products are said to be "state of the art".
(30)
A．To tell what "high tech" and "state of the art" are.
B．To tell how "high tech" and "state of the art" have developed.
C．To give examples of high tech.
D．To describe the modern technology.
听力原文： "High tech" and "state of the art" are two expressions that describe very modern technology. High tech is just a shorter way of saying high technology. And high technology describes any invention, system or device that uses the newest ideas or discoveries of science and engineering.
What is high tech？ A computer is high tech. So is a communications satellite. A modern manufacturing system is surely high tech.
High tech became a popular expression in the United States during the early 1980's. Because of improvements in technology, people could buy many new kinds of products in American stores, such as home computers, microwave ovens, etc.
"State of the art" is something that is as modem as possible. It is a product that is based on the very latest methods and technology. Something that is "state of the art" means the newest possible design or product of a business or industry. A state of the art television set, for example, uses the most modern electronic design and parts. It is the best that one can buy.
"State of the art" is not a new expression. Engineers have used it for years, to describe the best and most modem way of doing something.
Millions of Americans began to use the expression in the late 1970's. The reason was the computer revolution. Every computer company claimed that its computers were "state of the art".
Computer technology changed so fast that a state of the art computer today might be old tomorrow. The expression "state of the art" became as common and popular as computers themselves. Now all kinds of products are said to be "state of the art".
(30)
A．To tell what "high tech" and "state of the art" are.
B．To tell how "high tech" and "state of the art" have developed.
C．To give examples of high tech.
D．To describe the modern technology.
More people than ever are drinking coffee these
days--but in small quantities than they used to. Some 【S1】______
manufacturers of coffee makers are trying to make 【S2】______
advantage of this trend by developing diminutive
machines that brew(煮) smaller mounts of coffee.
Two U.S. appliance companies--Black & Decker,
basing in Towson, Maryland, and Toastmaster Inc. of 【S3】______
Columbia, Missouri--has recently introduced "drip" 【S4】______
coffee makers that brew one or two cup servings of
coffee. Neither of the products brew the coffee 【S5】______
directly into a cup or mug, eliminating the need for a
separate carafe. Since many people make a pot of
coffee in the morning and drink only a single cup, the 【S6】______
new coffee makers should reduce the wasted coffee.
Black & Decker's Cup-at-a-Time spends $27, while 【S7】______
Toastmaster's Coffee Break retails for $20.
Black & Decker also makes a coffee maker
drips coffee directly into a carry-around thermal 【S8】______
carafe. The carafe, a glass vacuum bottle, is supposed
to keep the coffee fresh for hours. The product,
called the Thermal Carafe Coffee-maker, comes with
a built-in lid that opens during die brewing process,
closes when it is completed. There are several models, 【S9】______
including one that fits under the counter, ranging
from $60 to $110 at price. 【S10】______
【S1】
Food which is kept too long decays because it is attacked by yeasts (酵母菌), moulds (霉) and bacteria (细菌). The canning process, however, seals the product in a container so that no infection can reach it, and then it is sterilized (消毒) by heat. Heat sterilization destroys all infectious present in food inside the can. No chemical preservatives are necessary, and properly canned food does not deteriorate during storage.
Today vegetables, fish, fruit, meat and beer are canned in enormous quantifies. Foods that were previously seasonal may now be eaten at any time, and strange foods are available far from the countries where they are grown. The profitable crops many farmers now produce often depend on the proximity (邻近) of a canning factory.
The first stage in the canning process is the preparation of the raw food. Diseased and waste portions are thrown away; meat and fish are cleaned and trimmed; fruit and vegetables washed and graded for size. The jobs are principally done by machine
The next stage, for vegetables only, is blanching. This is immersion (浸洗) in very hot or boiling water for a short time to remove air and soften the vegetable. This makes it easier to pack into cans for sterilization. Some packing machines fill up to 400 cans a minute. Fruit, fish and meat are packed mw and cold into cans, and then all the air is removed. When the cans are sealed, the pressure inside each can is only about half the pressure of the outside air. This is "vacuum" packing.
During the sterilization process which follows, the cans are subjected to steam or boiling water, with the temperature and duration varying according to the type of food. Cans of fruit, for example, take only 5-10 minutes in boiling water, while meat and fish are cooked at higher temperature for longer periods. After sterilization, the cans are cooled quickly to 32℃, to prevent the contents from becoming too soft.
The final stage before dispatch to the wholesale or retail grocer is labeling, and packing the tins into boxes. Nowadays, however, labeling is often printed on in advance by the can maker and no paper labels are then required.
Food deteriorates during storage because ______.
A．necessary chemical preservatives are totally absent from it
B．it is infected with yeasts, moulds and bacteria
C．heat sterilization destroys infections present in it
D．it isn't fit for storage
