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The full influence of mechanization began shortly after 1850, when a variety of machines came rapidly into use. The introduction of these machines frequently created rebellions by workers who were fearful that the machines would rob them of their work. Patrick Bell, in Scotland, and Cyrus McCormick, in United States, produced threshing machines. Improve- meats were made in plows to compensate for different soil types. Stream power came into use in 1860s on large farms. Hay rakes, hay-loaders, and various special harvesting machines were produced, Milking machines appeared. The internal-combustion engine run by gasoline became the chief power source for the farm.
In time, the number of certain farm machines that came into use skyrocketed and changed the nature of fanning. Be-tween 1940 and 1960, for example, 12 million horses and mules gave way to 5 million tractors. Tractors offer many. features that are attractive to farmers. There are, for example, numerous attachments: cultivators that can penetrate the s0il to varying depths, rotary hoes that chop weeds; spray devices that can spray pesticides in bands 100 feet across, and many others.
A piece of equipment has now been invented or adapted for virtually every laborious hand or animal operation On the farm. lathe United States, for example, cotton, tobacco, hay, and grain are planted, treated for pests and diseases, fertilized, cultivated and harvested by machine. Large devices shake fruit and nut from trees, gain and blend feed, and dry gain and hay. Equipment is now available to put just the right amount of fertilizer in just the right place, to spray an exact row width, and to count out, Space, and plant just the right number of seeds for a row.
Mechanization is not used in agriculture in many parts of Latin America, Africa, Agriculture innovation is accepted fastest where agriculture is already profitable and progressive. Some mechanization has reached the level of plantation agriculture in parts of the tropics, but even today much of that land is laboriously worked by people leading draft animals pal- ling primitive plows.
The problems of mechanization in some areas are not 0nly cultural in nature. For examples, tropical soils and crops differ markedly from those in temperate areas that the machines are designed for, so adaptations have to be made. But the greatest obstacle to mechanization is the fear in underdeveloped countries that the workers who are displaced by machines would not find work elsewhere, Introducing mechanization into such areas requires careful planning.
31. The first paragraph uses several examples to convey the ideas that______.
A) the introduction of machines into agricultural work created rebellions on the part of the farmers
B) the use of internal combustion engine as a chief power source for the farm produced great influence
C) the mechanization of agricultural work after 1850 gradually robbed many farmers of their work
D) ingenious improvements were made in fanning machines in the 1860s to yield production
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第4题:
You work as an administrator at ABC.com.The ABC.com network consists of a single domain named ABC.com.All servers in the ABC.com domain, including domain controllers, have Windows Server 2012 R2 installed.The ABC.com network has a server named ABC_SR09 that hosts two virtual machines.How would you enable Network Load Balancing (NLB) on the virtual machines?()
第5题:
A customer has 5 older POWER5 systems and they want to consolidate them onto a POWER6 system. What information is important to analyze when deciding how to design the new machine using the System Planning Tool?()
第6题:
A bank runs 50 workstations and would like to decrease its electricity costs, while not sacrificing functionality. All of the workstations are high-end performance units that are intended to be used for CAD-like applications. Analysts benefit from the added performance, but tellers and associates could use more minimalist systems. Which of the following methods would decrease the banks electricity and hardware costs?()
第7题:
transformed
transferred
transmitted
transported
第8题:
vmstat and iostat data from the older machines
The number of CPUs that were installed in the original machines
Data from Workload Estimator (WLE) and IBM Performance Management (PM)
Performance data that is collected from the new system after it has been put into production
第9题:
purifying
batch
long period
temporary
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第11题:
have more machines at their disposal
experience starvation
never work
have fewer machines at their disposal
第12题:
Install more machines.
Test the machines.
Buy more machines.
Sell the machines.
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第16题:
When a customer attempts to manage virtual machines, virtual images and system pools with the VMControl Express Edition, all operations fail except for managing virtual machines. What is recommended to resolve this situation?()
第17题:
When choosing a hostname, other machines will associate the name with()。
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第19题:
the IP address
the MAC address
inetd
port 80
第20题:
modem doctors should treat their patients as machines
the level of the treatment was greatly improved
they thought they were useless just like broken machines
they were not satisfied with the manner in which doctors treated them
第21题:
most movie theaters had a pianist, a hand or an orchestra
sound-effects machines were common because they were more effective
full-scale orchestras could effectively synchronize sound with pictures
gramophones came into being about the same time as moving pictures did
第22题:
Right.
Wrong.
Doesn’t say.
第23题:
work
working
to work
to be worked