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At its center, the sun has a density of over a hundred times ____A_____ and a temperature of 10 to 20 million degrees centigrade.
(A) that of water
(B) of water
(C) than that of water
(D) water
Fossil records support the assumption which microorganisms were the first forms of life.
A B C D
From colonial times ,United States property owners agreed to tax themselves on the theory......directly from services that the government could provide.
(a)property owners benefited so that
(b)why property owners benefited
(c)that if property owners benefited
(d)that property owners benefited
D
.Babies have soft spots between the bones of their skulls ,which allowing for further growth.
(D)
The astronauts chosen for fly the first United States spacecraft were selected from military test
A B C D
pilots.
(A)
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发表于 2005-8-15 08:28:00
