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【单选题】
某混合碱用盐酸滴定至酚酞变色,消耗 V 1 mL ,继续以甲基橙为指示剂消耗 V 2 mL, 已知 V 1 < V 2 ,组成是( )。
A.
Na 2 CO 3
B.
Na 2 CO 3 与 NaHCO 3
C.
NaOH 与 Na 2 CO 3
D.
NaHCO 3 与 NaOH
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【单选题】What does the work 'pest' in the second sentence of the first paragraph mean?
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【单选题】What does the word 'suspiciously' in the last sentence of the second paragraph mean in this text?
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【单选题】9个月患儿因化脓性脑膜炎入院,现患儿烦躁不安,喷射性呕吐,前囟隆起,高热持续不降。下列哪项是该患儿首选护理问题
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【单选题】What does the work 'pest' in the second sentence of the first paragraph mean?
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【单选题】What does the word 'suspiciously' in the last sentence of the second paragraph mean in this text?
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