临床放射性诊疗使用的是 What kind of radionuclide is used in nuclear medicine？A．低活度核素 Radionuclides of low radioactivityB．短半衰期核素 Radionuclides of short half-lifeC．大原子序数核素 Radionuclides of large atomic numberD．长寿命核素 Radionuclides of long half-life
临床放射性诊疗使用的是 What kind of radionuclide is used in nuclear medicine？
A．低活度核素 Radionuclides of low radioactivity
B．短半衰期核素 Radionuclides of short half-life
C．大原子序数核素 Radionuclides of large atomic number
D．长寿命核素 Radionuclides of long half-life
参考答案和解析
短半衰期核素 Short half-life nuclides
相关考题：
What is special about the battery?A. It is built in an iPhone.B. It is the smallest of its kind.C. It can also be used as a charger.D. It keeps power for about 30 days.
Electromagnetic EnergyWhite light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium(氦).Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.A. Nuclear Reactions as the Lasting Source of the Sun's EnergyB. The Most Important Source of EnergyC. Types of Electromagnetic EnergyD. X-rays Are Used to Detect and Treat Cancer.E. Seeking New Sources of EnergyF. Nuclear Energy is Beginning to Compete with CoalParagraph 3 ______
What is the main purpose of the passage?A. To teach patients ways for quick recovery.B. To present a report on a scientific research.C. To show the importance of a good lifestyle.D, To give information about a kind of medicine.
Jae Kwon gave examples in Paragraph 4_________.A. to show chemical batteries are widely applied.B. to introduce nuclear batteries can be safely used.C. to describe a nuclear-powered system.D. to introduce various energy sources.
Liquid semiconductor is used to _________.A. get rid of the radioactive wasteB. test the power of nuclear batteries.C. decrease the size of nuclear batteriesD. reduce the damage to lattice structure.
what kind of questions could be used to probe students’ existing knowledge ? () A. A handful of short-answer questionsB. Ten to twenty multiple-choice questionsC. All of the aboveD. Two or three open-ended questions
You are troubleshooting a WAN connection for TestKing, and on the router you execute the, debug ppp authentication command, and view the following output:What kind of handshake was used for the PPP authentication?（）A. one-wayB. two-wayC. three-wayD. No handshakes required during authenticationE. None of the above
共用题干If you made a list of all the jobs performed by the different kinds of energy,you would fill many pages.Nuclear energy is used in some areas of the United States.But there are dangers.Waste materials from nuclear______(51)would destroy life if they leaked______(52)the land.When nuclear energy is produced,a lot of______(53)is produced,too,50 a flow of lake or ocean water 15 used to cool the operations.Then the water______(54)to its source.If the returning water were too hot,it would destroy fish and other______(55).Cow manure is being used to produce a kind of______(56).The manure from farms is put into a machine to convert it to a liquid.Then the gas 15 formed______(57)a natural process.If the converter were not 50______(58)at the present time,it would be used in many places to provide______(59).Garbage has become an energy source.It______(60)to oil,steam,or electricity,or it is used on the land.But recent______(61)about power supplies has led to increased interest in the use of wind______(62)a source of electrical power.Windmills are clean and they______(63)no waste.And they use a______(64)resource.Some scientists consider that wind energy systems can fulfill a valuable______(65)in meeting the energy needs of industrialized nations and of the developing world._________(61)A:consideration B:thoughtC:concern D:interest
共用题干Electromagnetic Energy1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudyday it is possible to get a sunburn even though you feel cool.Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.2 The sun is 93 million miles away from the earth.Yet we can use energy from the sun because elec-tromagnetic energy travels through space.3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio , television , or radar. Ultraviolet rays（紫外线）and X-rays are electro- magnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings.Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel right through solid objects.They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the.sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man. Chemical energy comes from electron （电子）rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemi-cal reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.6 Nuclear energy is beginning to compete with coal as an economical source of power to generate elec-tncity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.Paragraph 5_____________A:Nuclear Reactions as the Lasting Source of the Sun's EnergyB:The Most Important Source of EnergyC:Types of Electromagnetic EnergyD:X-rays Are Used to Detect and Treat CancerE:Seeking New Sources of EnergyF:Nuclear Energy Is Beginning to Compete With Coal
共用题干Electromagnetic Energy1 White light seems to be a combination of all colors.The energy that comes from a source of light is not limited to the kind of energy you can see.Heat is given off by a flame or an electric light.On a cloudy day it is possible to get a sunburn even though you feel cool.Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.2 The sun is 93 million miles from the earth.Yet we can use energy from the sun because electromagnetic energy travels through space.3 Many other kinds of energy are also types of electromagnetic energy.Radio,television,and radar signals travel from transmitters to receivers as low-energy electromagnetic waves.Infrared（红外线的）radiation is an electromagnetic wave.When it is absorbed by matter,heat is produced.Waves of infrared and visible light have more energy than waves of radio,television,or radar.Ultraviolet rays（紫外线）and X-rays are electromagnetic waves with even greater amounts of energy.Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living.Ultraviolet radiation is useful in killing certain disease organisms.X-rays and gamma rays have so much energy that they travel through solid objects. They can be used to detect and treat cancer.X-rays are used in industry to find hidden cracks in metal,and in medicine to reveal broken bones.4 Usually we use electricity to generate electromagnetic energy.The source of most of our energy is the sun.Heat from the sun causes water to evaporate.When the water falls to the earth as rain,some of it is trapped behind dams and then used to operate electric generators.Other generators are powered by coal,but the energy stored in coal came from the sun,too.5 Until recently,the source of the tremendous amount of energy given off by the sun was a puzzle.If the sun depended on chemical reactions,it would have used up all its energy long ago.Experiments with electromagnetic radiation led to the theory that mass can be converted into energy.About forty years after the theory was proposed , nuclear energy was harnessed（利用）by man.Chemical energy comes from electron （电子）rearrangement.Nuclear energy comes from a change in the nucleus of an atom.Compared with chemical reactions,nuclear reactions release millions of times more energy per pound of fuel.We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium（氦）.6 Nuclear energy is beginning to compete with coal as an economical source of'power to generate electricity.It is also being used to operate engines in large ships.Scientists continue to seek new and better methods of obtaining and using energy.Paragraph 4______A:Nuclear Reactions as the Lasting Source of the Sun's EnergyB:The Most Important Source of EnergyC:Types of Electromagnetic EnergyD:The Machines Used for Energy GenerationE:Seeking New Sources of EnergyF:The Use of Ultravio1et Radiation in Medicine
Which is not one of the things researched by a bank? __________A.How much money the borrower ownsB.What salary the borrower makesC.What kind of job the borrower hasD.What kind of house the borrower lives in
What kind of （）can be used for gas and chemical fires?A、equipmentB、apparatusC、extinguishersD、machines
“请问您喜欢喝哪种茶？”用英语最妥当的表述是（）。A、What tea do you like？B、What kind of tea do you like？C、What kind of tea do you choose？D、What kind of coffee do you like？
What kind of cable should be used to establish a trunked line between two Catalyst 2950 switches?（）A、a straight-through cableB、an EIA/TIA-232 serial cableC、an auxiliary cableD、a modem cableE、a cross-over cable
单选题If the ship is alongside the wharf，what kind of（）is used?Apilot ladderBrope ladderCrod ladderDaccommodation ladder
单选题VHF Channel 6 is used exclusively for what kind of communications?（）ARadio checks and time checksBInter-vessel safety and search and rescueCWorking with helicoptersDRadio direction finding
单选题What can we learn from the passage?ASolar energy itself is expensive.BSolar power will be used up very soon.CSolar power is a kind of clean and useful energy.DSolar power is much better than the other energies.
单选题What is the relationship between “lactase” and “lactose” according to the passage?ALactase is indispensable to decomposing lactose.BThey both can act as a kind of enzyme.CLactase is the physical form of lactose.DLactase can be used to synthesize lactose.
单选题What kind of cable should be used to establish a trunked line between two Catalyst 2950 switches?（）Aa straight-through cableBan EIA/TIA-232 serial cableCan auxiliary cableDa modem cableEa cross-over cable
单选题What kind of experience does Mr. Nixon have with Employco?AHe worked for it in the past.BHe has used its website before.CHe is currently one of its headhunters.DHe was disappointed with its service.
单选题What does the passage mainly discuss?AThe acquisition of British Nuclear Fuels by Toshiba.BThe acquisition of Westinghouse Electric by Toshiba.CToshiba’s expansion in nuclear power business.DToshiba’s embarking on nuclear power business.
单选题The doctors gave Mr. Jackson the right medicine when _____.ALondon Zoo told them what kind of snake it wasBMr. Jackson sent the photo to the hospitalChe left hospital the next dayDthe snake bit him