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In this research at Columbia University, Charles Townes worked with ______.
A．stimulated emission
B．microwaves
C．maser
D．stimulated emission and microwaves
答案
更多“In this research at Columbia University, Charles Townes worked with ______.A．stimulated em”相关的问题
第2题
The phrase "the problem" (Line 3, Para. ) refers to ______.
A．raising the status of teaching with research
B．the combination of teaching with research
C．the separation of teaching from research
D．improving the status of research
第3题
A．research improves the quality of teaching
B．students who want to be challenged appreciate research professors
C．it is difficult to evaluate teaching quality objectively
D．professors with achievements in research are usually responsible and tough
第4题
Why do some people oppose stem cell research according to the man？
A．They don't know about the benefits of the research.
B．The research goes against their religious beliefs.
C．The research costs too much money.
D．They insist that the research is against nature.
第5题
What can we learn about the research on tree genes？
A．The research methods are the same as the analysis of human genes.
B．The findings are expected to be as fruitful as the analysis of human genes.
C．It will take as much time and effort as the analysis of human genes.
D．The research has been mainly concentrated on the genes of young trees.
第6题
They persevered in their research ______ (无论情况多么不利).
第9题
Less developed countries ______.
A．devote a large portion of their budget to applied research
B．realize that progress depends on basic research
C．encourage their career scientists to experiment
D．devote less than 70% of their scientific budget to basic research
第10题
A．find commercial applications for scientific research
B．set up informed goals before doing any scientific research
C．think critically and independently about how research is applied
D．adapt readily to the scientific development in the commercial sector
