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does not disturb existing pressures stays behind its disturbance does not produce great enough changes in pressure stays ahead of its disturbance
The Sonic Boom Air and Its Effects Faster Than Sound Problems Facing Aviation Today
The general economy cannot have immediate impact on housing market. Homes prices may start to decline at any time without warning. Even housing boom can lead to economic recession. People shouldn’t borrow money even when economy is in boom.
explosive caused by compressed tar a pressure disturbance shock wave
discover what causes the sonic boom find a means of eliminating the sonic boom produce the sonic boom at low altitudes reduce the sonic boom to tolerable levels
does not disturb existing pressures stays behind its disturbance does not produce great enough changes in pressure stays ahead of its disturbance
The Sonic Boom Air and Its Effects Faster Than Sound Problems Facing Aviation Today
discover what causes the sonic boom find a means of eliminating the sonic boom produce the sonic boom at low altitudes reduce the sonic boom to tolerable levels
创新引起的繁荣时间长，但繁荣之后的衰退短 创新引起的繁荣时间长，繁荣之后的衰退也长 创新引起的繁荣时间短，但繁荣之后的衰退长 创新引起的繁荣时间短，繁荣之后的衰退也短
The teaching profession during the baby boom. Birth rates in the United States in the 1930s and 1940s. The impact of the baby boom on public education. The role of the family in the 1950s and 1960s.
is; moves has been; moves is; move has been; move
The teaching profession during the baby boom Birth rates in the United States in the 1930s and 1940s The impact of the baby boom on public education The role of the family in the 1950s and 1960s
explosive caused by compressed tar a pressure disturbance shock wave
the baby boom had little influence on the attention of educations before the baby boom, basic academic skill and discipline did not interest educators after the baby, the elder youths still had chance to gain nontraditional, new, and extra services the school system shifted its attention form the lower grades to older youths
did the baby boom begin that the baby boom began when the baby boom began then the baby boom began
Spotting a boom Collaring a boom Cradling a boom Toppling a boom"
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