L2：
Lecture 2
第一题
What is the lecture mainly about?
AWays to generate heat for nuclear fusion
BDifferences between nuclear fission and nuclear fusion
CA controversial theory regarding how to generate nuclear fusion
DThe possibility of establishing sustained nuclear fusion
第二题
According to the students, what are three advantages of nuclear fusion over nuclear fission?
Select 3 answers
ANuclear fusion can use a fuel that is more easily obtained.
BNuclear fusion can be achieved at lower temperatures.
CNuclear fusion produces more energy.
DNuclear fusion does not produce hazardous by-products.
ENuclear fusion does not require as many natural resources.
第三题
Why does the professor mention isotopes of hydrogen?
ATo correct a student’s comment about how fusion takes place in stars
BTo help answer a student’s question about temperature requirements for fusion reactors
CTo explain what happens to hydrogen atoms during fusion reactions
DTo justify the need for superconducting magnets in nuclear fusion reactors
第四题
According to the professor, how will the ITER reactor differ from earlier experimental fusion reactors?
Select 2 answers
AIt will be transportable to different locations.
BIt will sustain nuclear reactions through heat that it generates on its own.
CIt will heat the fuel mixture to a higher temperature.
DIt will confine the plasma in a more energy- efficient way
第五题
What does the professor say about the international effort to develop ITER?
AThe participation of many countries may cause ITER to be delayed even more.
BThe research orientation of ITER has encouraged international collaboration.
CITER will make use of equipment made in many different countries.
DThe lack of international cooperation on earlier fusion projects has hurt ITER.
第六题
What does the professor imply when he says this:
AHe prefers to work on projects with more immediate results.
BHe believes that research in the physical sciences requires strict time lines.
CHe thinks it will take less time to develop ITER than most researchers expect.
DHe is more skeptical about the future of nuclear fusion than most researchers are.
