Shifting to a new food freezing method could make for safer and better quality frozen foods while saving energy and reducing carbon emissions，according to a new study.
"A complete change over to this new method of food freezing worldwide could cut energy use by as much as 6.5 billion kilowatt-hours each year while reducing the carbon emissions that go along with generating that power by 4.6 billion kilograms，the equal to removing roughly one million cars from roads，" said the research food technologist Cristina Bilbao-Sainz.
The new freezing method，called isochoric freezing（等容冷凍），works by storing foods in a sealed，rigid container-typically made of hard plastic or metal-completely filled with a liquid such as water.Unlike conventional freezing in which the food is exposed to the air and freezes solid at temperatures below 32 degrees F，isochoric freezing preserves food without turning it to solid ice.
As long as the food stays immersed（浸入的）in the liquid part，it is protected from ice crystallization（結晶），which is the main threat to food quality.
"Energy savings come from not having to freeze foods completely solid，which uses a huge amount of energy，plus there is no need to turn to energy-consuming cold storage methods such as quick freezing to avoid ice crystal formation，" Bilbao-Saing said.Isochoric freezing also allows for higher quality storage of fresh foods that are otherwise difficult to preserve with conventional freezing.Another benefit is that it also kills microbial pollutants during processing.
"The entire food production chain could use isochoric freezing.The process will even work in a person's freezer at home after they purchase a product -all without requiring any major investments in new equipment，" said Tara McHugh，co-leader of this study."With all of the many potential benefits，if this advanced concept catches on，it could be the next revolution in freezing foods."
（1）How does the author mainly develop paragraph 2？ BB
A．By giving examples.
B．By presenting figures.
C．By making comparison.
D．By answering questions.
（2）How does the new method differ from the traditional one？ CC
A．It turns food into solid ice.
B．It keeps unsteady temperatures.
C．It protects food from ice crystallization.
D．It has the special materials of the container.
（3）What is paragraph 5 mainly about？ BB
A．Ways of preserving fresh foods.
B．Advantages of isochoric freezing.
C．Main applications of isochoric freezing.
D．Other methods of avoiding polluting foods.
（4）What can be inferred about isochoric freezing from the last paragraph？ CC
A．It will be improved soon.
B．It will cut its high cost soon.
C．It can be applied more widely.
D．It can do more harm to the environment.
【答案】B；C；B；C
【解答】
【點評】
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發(fā)布：2024/5/27 14:0:0組卷：1引用：1難度：0.5
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B．It is located in London.
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