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提问人:网友yanweiwei55 发布时间:2022-01-07
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(课外选材)According to experts, the advantage of modified food is that it helps in pre

(课外选材)

According to experts, the advantage of modified food is that it helps in preventing the occurrence of allergies and also has a long shelf life. However, a major portion of the population is against the consumption of genetically modified food and is concerned about its disadvantages. If you are also confused about the consumption of genetically modified food, read through the pros and cons given below and decide for yourself.

ADVANTAGES OF GENETICALLY MODIFIED FOODS

●One of the most prominent advantages of genetically modified food is that it helps in controlling the occurrence of certain diseases. Certain foods cause allergy to people. Their genetic modification alters the DNA system of these foods, thereby making them non-allergic.

●Another major advantage of such type of foods is that they grow faster than their traditionally grown counterparts. As a result, there is greater productivity and more food.

●A person need not bother about any additional costs, such as buying chemicals and pesticides, when it comes to genetically engineered food. The food is naturally pest-resistant.

●Farming these foods can be a great way to fight world hunger. Since these crops grow faster or more effectively, increased production would help countries wherein crops may not normally prosper because of less than desirable environmental conditions.

●The increased shelf life of these food products helps in reducing the quantity of rotten food.

DISADVANTAGES OF GENETICALLY MODIFIED FOODS

●The biggest disadvantage of genetically modified food is that they have harmful effects on the human body. The consumption of these genetically engineered foods can lead to development of diseases that are immune to antibiotics.

●Chances of developing cancer are high in people who regularly consume engineered food.

●Since it is an unnatural way of producing foods, there is an increased health hazard such as allergens, transfer of antibiotic resistance markers and unknown effects.

●Since the production of engineered food involves infusing animal genes in the crops and tampering with nature, it might not be good for consumption in the long run.

1. How does genetically modified food control the occurrence of certain diseases?{A; B; C}

A. By cross-pollinating.

B. By conventional crossbreeding.

C. By altering the DNA system of these foods.

2. Do farmers need to buy any chemicals and pesticides if they plant genetically modified food?{A; B; C}

A. Yes, they need to. Because the food is not resist to pests.

B. No, they don’t need to. Because the food is naturally pest-resistant.

C. No, they don’t need to. Because the chemicals and pesticides are provided by the government.

3. Which statement is not the advantage of genetically modified food?{A; B; C}

A. It may have harmful effects on human body.

B. Genetically modified food grows faster than their traditionally grown counterparts.

C. Farming genetically modified food can help fight world hunger.

4. What would happen to a person if he regularly consume genetically modified food?{A; B; C}

A. He would get cold.

B. He would lose some weight.

C. He would have cancer.

5. Which title is the best for this passage?{A; B; C}

A. Can genetically modified foods combat world hunger?

B. Genetically modified mood: our answer is no

C. Genetically modified foods: pros and cons

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更多“(课外选材)According to experts, the advantage of modified food is that it helps in pre”相关的问题
第1题
中学课外音乐歌咏活动的歌曲选材要()的特点。

A.符合音乐教师

B.符合多数学生

C.符合中学生

D.符合少数学生

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第2题
进行热力计算的目的The purpose of thermodynamic calculation

A、计算物性参数——水力计算的需要。Calculation of physical parameters - requirements for hydraulic calculation.

B、根据沿线温降曲线,分析凝析水和水合物可能形成的段落——判断水合物生成区域的需要。According to the temperature drop curve along the line, the possible stages of condensate water and hydrate formation are analyzed -- the need of hydrate formation area is determined.

C、为管线热应力计算和绝缘层选材设计提供依据——管道强度计算的需要。It provides the basis for calculation of thermal stress of pipeline and material selection design of insulation layer.

D、以上都不对

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第3题
课外选材WIDE WORLD OF ROBOTSEngineers who build and program robots have fascinating jobs

课外选材

WIDE WORLD OF ROBOTS

Engineers who build and program robots have fascinating jobs. These researchers tinker (修补) with machines in the lab and write computer software to control these devices. "They're the best toys out there," says Howle Choset at Carnegie Mellon University in Pittsburgh. Choset is a roboticist, a person who designs, builds or programs robots.

When Choset was a kid, he was interested in anything that moved--cars, trains, animals. He put motors on Tinkertoy cars to make them move. Later, in high school, he built mobile robots similar to small cars.

Hoping to continue working on robots, he studied computer science in college. But when he got to graduate school at the Califomia Institute of Technology in Pasadena, Choset's labmates were working on something even cooler than remotely controlled cars: robotic snakes. Some robots can move only forward, backward, left and right. But snakes can twist (扭曲 ) in many directions and travel over a lot of different types of terrain (地形) . "Snakes are far more interesting than the cars," Choset concluded.

After he started working at Carnegie Mellon, Choset and his colleagues there bagan developing their own snake robots. Choset's team programmed robots to perform. the same movements as real snakes, such as sliding and inching forward. The robots also moved in ways that snakes usually don't, such as rolling.

Choset's snake robots could crawl (爬行) through the grass, swim in a pond and even climb a flagpole.

But Choset wondered if his snakes might be useful for medicine as well. For some heart surgeries, the doctor has to open a patient's chest, cutting through the breastbone. Recovering from these surgeries can be very painful. What if the doctor could perform. the operation by instead making a small hole in the body and sending in a thin robotic snake?

Choset teamed up with Marco Zenati, a heart surgeon now at Harvard Medical School, to investigate the idea. Zenati practiced using the robot on a plastic model of the chest and they tested the robot in pigs.

A company called Medrobotics in Boston is now adapting the technology to surgeries on people.

Even after 15 years of working with his team's creations, "I still don't get bored of watching the motion of my robots," Choset says.

1. Choset began to build robots in high school.{T; F}

2. Snake robots could move in only four directions.{T; F}

3. Choset didn't begin developing his own snake robots until he started working at Carnegie Mellon.{T; F}

4. Zenati tested the robot on people after using it in pigs.{T; F}

5. The robotic technology for surgeries on people has brought a handsome profit to Medrobotics.{T; F}

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第4题
(课外选材)When computer servers operate a complex program, they can get very hot. Cool

(课外选材)

When computer servers operate a complex program, they can get very hot. Cooling the servers can be costly. So researchers asked what would happen if the heat created by the servers could be captured and used?

Data centers of large Internet companies such as Google and Microsoft have thousands of computer servers. As these servers process information, they create large amounts of heat, so they need huge cooling systems. These systems send the heat into the air. The Dutch company Nerdalize thinks paying for electricity to operate the servers and then paying again to cool them is a waste of energy. So it developed a device called the e-Radiator. It is a computer server that also works as a heating source. Boaz Leupe is the chief executive officer of Nerdalize. He says the e-Radiator saves money because companies don't have to pay to cool their servers.

"The kilowatt(千瓦)hour you are using is used twice -- once to heat the home and once to compute the client's task without the cooling overhead." He says five homeowners in the Netherlands are testing the heating device in their homes. "We reimburse the electricity the server uses, and that we can do because of the computer clients on the other side, and, in that way, homeowners actually get heating for free, and computer users don't have to pay for the overhead of the data center.

Jan Visser is one of the participants in the year-long experiment. He says the amount of heat produced by the e-Radiator depends on the work being done by the computer server. He says it cannot be used as the primary source of heat. But he is ready to try it.

He says if it provides enough warmth, he will be able to use his home's heating system less, which will save him money. Nerdalize says e-Radiators create heat temperatures of up to 55℃. It says the devices could save users up to $440 in heating costs a year.

1.Why did researchers ask what would happen if the heat created by the servers could be captured and used?{A; B; C}

A. Because computers can get very hot.

B. Computer servers is a complex program.

C. Cooling computer servers costs a lot of money.

2.The computer servers in large Internet companies such as Google and Microsoft can {A; B; C}.

A. create large amounts of information

B. create large quantity of heat

C. manage the huge cooling systems

3. Nerdalize developed the e-Radiator because {A; B; C}.

A. e-Radiator cost less energy

B. e-Radiator can cool the servers for free

C. e-Radiator can create cold air for free

4.According to Jan Visser, the amount of heat produced by the e-Radiator {A; B; C}.

A. depends on the work being processed by PC

B. cannot be used as the home's heating system

C. cannot be used as the main source of heat

5.The best title for this passage is {A; B; C}

A. The New Way to Heat Homes

B. The New Way to Cool Homes

C. Hot Computers Could Be Used for Free

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第5题
诉讼文书选材要准确,其含义有()

A.选材的针对性

B.选材具体形象

C.选材要突出重点

D.选自己喜欢的材料

E.援引法律要确切

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写作的基本过程包括()

A.命题

B.立意

C.选材

D.组材

E.想象

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第7题
贮木场阶段核算()的生产费用

A.卸车

B.搬运

C.造材

D.选材

E.归楞

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基本仓储决策有哪些()

A.产权

B.数量

C.规模

D.货物类型

E.货物保质期

F.仓储选材

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文章写作过程中运思的内容包括()。

A.择体

B.理序

C.选材

D.定向

E.审题

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幼儿园自制玩教具的制作一般需经过()几个步骤。

A.设计

B.选材

C.制作

D.使用

E.改进

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