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【单选题】
轴承中保持架的作用是( )。A.
滚动体没着滚道流动
B.
滚动体沿着滚道旋转
C.
将滚动体均匀的隔开
D.
让滚动体均匀的旋转
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【单选题】Questions 61-65 are based on Passage Two: Passage Two As the 21st century begins, a number of leaders in politics, education, and other professions believe that the US must adopt some new values to go...
A.
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B.
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C.
The Need for New National Values
D.
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【简答题】Passage Two Questions 62 to 66 are based on the following passage. 第62题：
【简答题】Passage Two:Questions 26 to 30 are based on the following passage.A breakthrough (突破) in the provision of energy from the sun for the European Economic Community (EEC) could be brought forward by up t...
【简答题】Two of the results of lacking water mentioned in the passage are ______.
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