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【多选题】
可同时承受径向载荷和轴向载荷,一般成对使用的滚动轴承是()。
A.
深沟球轴承
B.
圆锥滚子轴承
C.
角接触球轴承
D.
推力球轴承
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A.
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B.
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A.
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B.
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C.
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D.
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A.
inventions
B.
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A.
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B.
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C.
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【单选题】What do you know about the speaker from the story?
A.
She was probably the youngest patient of Alzheimer's disease
B.
Four years after she came down with Alzheimer's disease, she was confident that the disease could be cured.
C.
She started a support group for patients suffering from the same disease.
D.
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【单选题】下列哪种疾病伴有阵发性鼻阻塞( )
A.
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B.
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C.
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D.
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