更多"Sound waves reflected from a hill c"的相关试题:
[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
[单项选择]Radio signals are waves that are used to _________ music or speech.
A. transfer
B. transmit
C. transport
D. transform
[单项选择]From the hill top we can see horses are ______ here and there in the pasture.
A. gazing
B. biting
C. licking
D. devouring
[单项选择]The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his body.
A. precede
B. proceed
C. progress
D. practice
[单项选择]We can learn from the passage that Blackpool used to
A. have as many beaches as Luxemburg.
B. have seriously polluted drinking water.
C. boast some imposing seafront sights.
D. attract few domestic holiday makers.
[单项选择]Ice can be used to keep food from spoiling.
A. rotting
B. aging
C. toughening
D. evaporating
[单项选择]From the report, we can infer that Fail, ah used to be ______
A. one of US military bases
B. near the Syrian border
C. an insurgent haven
D. the home of Abu Musab al-Zarqawi
[单项选择]（） from the hill, the sense of pride suddenly appeared in our mind.
A. When we saw it
B. Having seen
C. Seeing
D. Seen
[单项选择]The British used radio waves because they______.
A. were more exact than sound waves
B. could not be detected
C. could penetrate fog and clouds
D. were easier to use than sound waves
[单项选择]That boys suffer more from air pollution can possibly be justified by the fact that ______.
A. the male have larger bones than the female
B. women can manufacture blood more efficiently than men
C. men usually breathe more deeply than women
D. women breathe as often as men
[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]Waves generally result from wind ______ on water.
A. acts
B. to act
C. it acts
D. acting
[单项选择]______ from the hill, the sense of pride suddenly appeared in our mind.
A. When we saw it
B. Having seen
C. Seeing
D. Seen
[单项选择]The movement of people to and from the city can explain
A. racial conflict
B. social changes
C. violent crime
D. the best aspects of a society
