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【单选题】
试管A中含有10mL0.6mol／L Na 2 CO 3 溶液，试管B中含有10 mL0.8mol／L HCl溶液，现将试管A逐渐倒入试管B中产生气体的体积与将试管B逐渐倒入试管A中产生气体的体积比为
A.
4：l
B.
5：3
C.
3：1
D.
2：1．
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