在 Na 2 S 4 O 6 、 Na 2 S 2 O 3 、 Na 2 S 2 O 8 中, S 的氧化数分别为 ( ) 。
A.
+2.5 , +2 , +7
B.
+2 , +2.5 , +8
C.
+2.5 , +4 , +6
D.
+2.5 , +2 , +6
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】文本 I don't normally get stage fright, but the thought of getting up in front of my colleagues to give a presentation always gives me butterflies. But I have no choice; my boss asked me to do it, so I ...