题目:
若在加入铝粉能产生氢气的溶液中分别加入下列各组离子,可能大量兴存的一组是
A.NH+4、NO-3、CO2-3、Na+
B.Na+、Ba2+、Mg2+、HCO-3
C.NO+3、Fe2+、Cl-、Ca2+
D.NO-3、Na+、K+、Cl-
答案:
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1. What is his English name? 2. Her family name is Smith. 3. My ID card number is 666-5655. 4. Nice to meet you, too. 5. What is your name, please?