In his research at Columbia University Charles Townes worked with all of the following EXCEPT______.
A: stimulated
B: amplification
C: microwaves
D: a maser
A: stimulated
B: amplification
C: microwaves
D: a maser
举一反三
- In his research at Columbia University, Charles Townes worked with all of the following EXCEPT _________. A: stimulated emission B: microwaves C: light amplification D: a maser
- In this research at Columbia University, Charles Townes worked with ______. A: stimulated emission B: microwaves C: maser D: stimulated emission and microwaves
- Which of the following schools is not included in Ivy League schools?( ) A: Harvard University B: the University of Pennsylvania C: Columbia University D: University of Cambridge
- All of the following are the writers in the Victorian period except ________ ? A: Charles Dickens B: George Eliot C: Thomas Hardy D: Virginia Woolf
- Which of the following universities is the oldest institution of higher education in the U.S.A.? A: Princeton University B: Harvard University C: Yale University D: Columbia University