更多"Why was Townes' early work with sti"的相关试题:
[单项选择]Why was Towne's early work with stimulated emission done with microwaves
A. He was not concerned with light amplification.
B. It was easier to work with longer wavelengths.
C. His partner Schawlow had already begun work on the laser.
D. The laser had already been developed.
[单项选择]Townes's early work with stimulate emission was done with microwaves because______.
A. he was not concerned with amplification
B. his partner Schawlow had already begun work on the laser
C. it was easier to work with longer wavelengths
D. the laser had already been developed
[单项选择]I couldn't work out why anyone would invent something so boring.
A. draw up
B. bring about
C. put forward
D. figure out
[单项选择]Early humans made up the "why" stories because they ______.
A. were trying to explain the things around them
B. wished to develop their imagination
C. were afraid that Demeter would bring more winter
D. wanted to make the angry gods happy
[单项选择]Why was postage high in the early 19th century
A. Because the prices of goods (物价) were very high.
B. Because the post office wanted to earn too much money.
C. Because many people had to be paid for getting the postage.
[单项选择]Why must nurses work in shifts
A. They are careless.
B. Nursing services must be provide continuously.
C. They work at night from time to time.
D. A shift is usually eight hours long.
[单项选择]Why does the man want an early appointment
[单项选择]Why does Brendan think he might retire early
A. He thinks computer games might not always sell so well.
B. He wants to stop working when he is a millionaire(百万富翁).
C. One has to be young to write computer programs.
D. He thinks his company might close down.
[单项选择]Why were people in the early 19th century unhappy when they received letters
A. Because they had to buy stamps.
B. Because they had to pay postage.
C. Because the letters always brought them bad news.
[单项选择]This morning I got up early and went to work, only ______ there was nobody in the office because it is Sunday.
A. finding
B. to find
C. found
D. being found
[单项选择]Why is coming back to work tiresome
