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During the period 1490—1979 the main progress mentioned in this passage was______. Soebe’s invention was net a perfect one, bec
During the period 1490—1979 the main progress mentioned in this passage was______. Soebe’s invention was net a perfect one, bec
admin
2009-06-24
44
问题
During the period 1490—1979 the main progress mentioned in this passage was______.
Soebe’s invention was net a perfect one, because______.
选项
A、too great a supply of air could result in a sudden rise to the surface.
B、a sudden dive into deep water could cause the crushing of the body.
C、the air pipe attached to a machine could be above the surface.
D、both A and B.
答案
D
解析
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本试题收录于:
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公共英语(PETS)
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