首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Some fish can swim in water below 0°C, low enough to freeze the blood of most creatures. However, some fish and insects can stay
Some fish can swim in water below 0°C, low enough to freeze the blood of most creatures. However, some fish and insects can stay
admin
2015-01-31
43
问题
Some fish can swim in water below 0°C, low enough to freeze the blood of most creatures. However, some fish and insects can stay alive in the freezing water. One key to survival is a special protein in the fish’ s blood. The chemical is called the Antifreeze Protein, otherwise known as AFP and is commonly found in fish that live in cold waters.
What does AFP do in these fish? First, we need to understand what happens when water freezes. When the temperature of the water drops below -1.0°C, tiny particles of ice start forming in the water. Each particle becomes larger and then sticks to other particles, forming blocks of ice. Fish take in this water and tiny particles of ice also form inside a fish’s body. However, the AFP in the blood of the fish surrounds these particles, preventing them from sticking together to form bigger pieces of ice.
The application of AFP is promising. For example, AFP can be used to alter the taste and texture of ice-cream. It can also be used to store meat and vegetables more effectively by protecting food products from the formation of ice. Another application is in medical field, as AFP can help preserve organs for transplantation without freezing them. Scientists have known about AFP for more than 30 years, yet few of the technologies that use the AFP exist today. The process of getting the necessary amount of AFP from fish to make products was only recently discovered. Some companies in the United States and Canada have already made products using AFP, but they have yet to become popular. Although some researchers in Japan discovered that some local fish contained AFP and succeeded in creating AFP in the laboratory, more research is necessary. AFP tests will continue for these fish out of the water.
What can AFP possibly do in the future?
选项
A、Make fresh fruits and vegetables taste better.
B、Protect dried meat from being damaged by ice.
C、Keep meat and vegetables from going bad.
D、Help doctors freeze organs for transplantation.
答案
C
解析
细节题。短文第三段开头主要讲AFP的用途。由It can also be used to storemeat and vegetables more effectively by…可知它可以用来储存肉和蔬菜,防止变质。故选项C正确。
转载请注明原文地址:https://jikaoti.com/ti/Yc4FFFFM
0
大学英语四级
相关试题推荐
FreeSchoolMealsMillionsofAmericanschoolchildrenarereceivingfreeorlow-costmealsforthefirsttimeastheirparen
Accordingtothereport,about60%oftrafficjamsinthiscity______(是由行车不慎造成的).
A、Thetestistakenonacomputer.B、Thecostofthetestisthesameallovertheworld.C、Ittestspeople’sEnglishabilityto
ABriefHistoryofOnlineShoppingA)WhenAmazon.comopenedforbusiness15yearsago,itwasnothingmorethanafewpeoplepac
ABriefHistoryofOnlineShoppingA)WhenAmazon.comopenedforbusiness15yearsago,itwasnothingmorethanafewpeoplepac
A、Meethimatthecafeteria.B、Gotothecafeteriawithouthim.C、Bringhimsomethingfromthecafeteria.D、Waitforawhileunt
ThePeakTimeforEverythingA)Couldyoupackmoreintoeachdayifyoudideverythingattheoptimaltime?Agrowingbodyofre
Forthispart,youareallowed30minutestowriteashortessayentitledStylesofLivingfollowingtheoutlinegivenbelow.Yo
A、Hedoesn’tliketotalk.B、Heisaverykindman.C、Heisfriendly.D、Heisnotapleasantperson.D
A、Itislinedwithtalltrees.B、Itwaswidenedrecently.C、Ithashighbuildingsonbothsides.D、Itusedtobedirtyanddisor
随机试题
女孩15岁,因身材矮小就诊,查体:身高135cm,体重45kg,发际低,颈侧皮肤松弛,面部及前胸散在较多的痣,智能发育正常。胸比较宽,两侧乳头间距增宽,乳房未发育,无阴毛及腋毛,外生殖器婴儿型。心肺听诊无异常。追问病史未来过月经。适合该患儿的治疗措施是
吐泻转筋,宜选用风湿痹痛发热,关节红肿者。宜选用
患者,男性,38岁,患急性黄疸型肝炎住院,护士制订的护理措施应除外
按债券票面利率是否变动可将债券分为()。
电杆竖立后,应检查电杆是否位于线路的中心线上,其偏差不应超过()。
下列需要有资质的检测部门进行强度和严密性试验的阀门有()。
关于完全垄断市场的需求曲线的说法,正确的是( )。
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
请根据以下各小题的要求设计VisualBasic应用程序(包括界面和代码)。(1)在名称为Form1的窗体上画一个名称为Pic的图片框,通过属性窗口将考生文件夹下的文件Tu1-1.jpg添加到图片框,然后编写适当的事件过程。运行程序时,单击窗体,在图片
根据汉字国标GB2312.80的规定,二级次常用汉字个数是
最新回复
(
0
)