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 calculate the______.
A. Speed of sound
B. time between a sound and ifs echo
C. height of the hill
D. distance of the hill
[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]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]Speaker A: Oh, hi Dr. Hill. Can I discuss my grade on my term paper with you now Speaker B: Sure.________
A. What seems to be the problem
B. That seems to be a mistake.
C. I really appreciate it.
D. Could I check back with you later
[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]Ocean waves can cut imposing cliffs along coastlines.（）
A. immobile
B. impermeable
C. impressive
D. imaginative
[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
