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【单选题】
多巴胺增加肾血流量的主要机理是A.
兴奋β1受体
B.
兴奋β2受体
C.
兴奋多巴胺受体
D.
阻断α受体
E.
直接松弛肾血管平滑肌
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A.
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A.
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B.
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A.
Diesel engine propulsion
B.
Diesel electric propulsion
C.
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D.
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A.
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B.
proportion
C.
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D.
percent
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