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【简答题】
George was so busy that he had only one afternoon a week
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皮皮学刷刷变学霸
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【简答题】集团蠕动(mass peristalsis)
【单选题】The pull of gravity depends upon size, _______, upon mass. An object, whether its mass is big or small on the earth, ________in weightless conditions, like the outer space. [ ]
A.
or rather; floats
B.
rather than; flies
C.
to be more exact; flies
D.
other than; floats