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【单选题】
静脉输液时导致静脉炎的原因不包括
A.
长期输入高浓度溶液
B.
静脉内留置导管时间过长
C.
无菌操作不严格
D.
长期输入刺激性强药物
E.
输液速度过快
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A.
夸克存在 6 种味,即上、下、奇、粲、底、顶
B.
每种味的夸克,包含 3 种颜色,即红、绿、蓝
C.
反夸克也具有颜色
D.
夸克由质子和中子构成
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A.
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B.
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C.
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A.
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