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d. tất cả đều sai
2) Các chất sau đây: NO, N
2
O
3
, NO
2
, HNO
3
. Chất nào chỉ có tính oxihóa thôi:
a. NO, NO
2
b. NO
2
c.HNO
3
d. Tất cả đều sai
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