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延髓背外侧综合征表现?
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皮皮学刷刷变学霸
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【单选题】If the land area of the earth is about 55,000,000 square miles, the area that can be explored in space is probably______.
A.
55,000,000 square miles
B.
70,000,000 square miles
C.
13,720,000 square miles
D.
550,000,000 square miles
【简答题】阅读理解。 The earth is about 4,600 million years old. Modern man has lived on the earth for only 35,000 years, but during that time, we have changed our planet in many ways. Many of the things that we hav...
【单选题】The earth is about __ as the moon.
A.
as fifty time big
B.
fifty times as big
C.
as big fifty time
D.
fifty as times big
【单选题】The earth is about ( ) as the moon.
A.
as fifty time big
B.
as big fifty times
C.
fifty as times big
D.
fifty times as big
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