更多"(Sound waves) travel (in the air) i"的相关试题:
[单项选择](Sound waves) travel (in the air) in much (the same) way (like) water waves spread on the water.
A. Sound waves
B. in the air
C. the same
D. like
[单项选择]When we speak, sound waves begin to travel and go in all directions.
A. 当人们说话时，声音向四面八方传开。
B. 当我们说话时，声音就开始传播，并且向四面八方传开。
C. 当我们说话时，声波开始传递，而且向四面八方传播。
D. 当说话时，声波就开始旅行，并且走向四面八方。
[单项选择]When we speak，sound waves begin to travel and go in a11 directions．
A. 当人们说话时，声音向四面八方传开。
B. 当我们说话时，声音就开始传播，并且向四面八方传开。
C. 当我们说话时，声波开始传递，而且向四面八方传播。
D. 当我们说话时，声波就开始传播，并且走向四面八方。
[单项选择]Sam likes music very much.He livesbut he never feels.
A. alone;lonely
B. alone;alone
C. lonely;alone
D. lonely;lonely
[单项选择]Without the worker's help, Sam ______ so much progress.
A. would not make
B. would not have made
C. will not make
D. did not make
[单项选择]Initial reports were that multiple waves of warplanes bombed central Baghdad, hitting oil refineries and the airport.
A. beating
B. knocking
C. hurting
D. striking
[单项选择]From the second paragraph we know that high waves striking the shore are ______.
A. gradually reduced
B. still very powerful
C. difficult to predict
D. sometimes quite weak
[单项选择]The storm died away at last with the golden waves ______ the shore in peace.
A. beat
B. to beat
C. beating
D. beaten
[单项选择]If the radio waves had reached our planet one hundred years before, we would have______.
A. sent an immediate answer
B. sent an alarm against extraterrestrial attack
C. sent a short reply
D. sent no answer
[单项选择]Why were Sam and Joe chosen
A. The boss wanted them to get more experience.
B. The boss trusted them more than anyone else.
C. They were the last people who wanted to go.
D. They were the only men who offered to go.
[单项选择]Major developmental thrusts, or "waves" as Alvin Toffler calls them, follow each other in succession, each adding a vital new {{U}}aspect{{/U}}.
A. viewpoint
B. dimension
C. appearance
D. attitude
[单项选择]Sound waves reflected from a hill can be used to estimate______.
A. height of the hill
B. speed of sound
C. distance of the hill
D. intensity of sound
