国债常见的赎回保护期是发行后()年。
A.1~3
B.3~5
C.5~8
D.5~10
第2题
(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
第3题
(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
第4题
The speed ______ is 340 meters per second.
A.at which sound travels
B.with which sound travels
C.of which sound travels
D.for which sound travels
第5题
The speed ______ is 340 meters per second.
A.at which sound travels
B.with which sound travels
C.of which sound travels
D.for which sound travels
第6题
The speed __________ is 340 meters per second.
A.at which sound travels
B.with which sound travels
C.of which sound travels
D.for which sound travels
第7题
The speed __________is 340 meters per second.
A.at which sound travels
B.with which sound travels
C.of which sound travels
D.for which sound travels
第8题
Which of the following is true?
[A] Sound travels fastest through the hardest things.
[B] Sound travels at different speed in different temperatures and in different media.
[C] Sound travels fastest in hottest temperature.
[D] Sound travels fastest in coldest temperature.
第9题
______ travels faster than ______.
A.The light, sound
B.Light, the sound
C.Light, sound
D.The light, tile sound
第10题
Which of the following statements is TRUE?
A.Sound travels faster through cold water than warm water.
B.By transmitting sound waves, the scientists will be able to determine if our planet is warming up.
C.If sea animals are distressed by the sounds, they would swim away from the speaker.
D.There are signs that the animals are being harmed.
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