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【简答题】
用一个仪表测量某一物理量9次,得样本均值56.32,样本标准差0.22,则 的置信水平为0.95的置信区间____.____
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【单选题】听力原文： The state of Georgia is in the midst of a major drought. Experts predict that, unless it rains 'cats and dogs' real soon, the whole city of Atlanta will have no drinking water in four months. La...
A.
Because Georgia planned to cut off the highways to them.
B.
Because Georgia caused a big fire which affected them.
C.
Because Georgia tried to block the Chattahoochee River.
D.
Because Georgia had cut off the food supply to them.
【单选题】— It's said that it will be extremely cold this winter. — ______, the majority of the experts predict that the temperature will be normal. [ ]
A.
In other words
B.
On the contrary
C.
As a result
D.
What's more
【简答题】Health experts predict that soon, more people will die from cancer than from , tuberculosis (结核病)and malaria combined（疟疾）. They expect that by 2013, cancer will become the world’s leading cause of...
【单选题】The handle of the nanobrush is ______.
A.
thicker than a human hair
B.
thirty billionths of a meter across
C.
a few millionths long
D.
relatively smaller than the brush
【简答题】Glaciers are much thicker than previously thought, which means ______into the ocean.
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