中学生网络课堂本课配套习题挑战模式4/5
多选题
难度系数：
4.
某含氧酸的化学式为HnXO2n-1，则X的同价态的氧化物的化学式可能为（ ）。
| A: X2O |
| B: XO2 |
| C: X2O3 |
| D: XO3 |
一次做对，真牛！
+5奖励规则>
- 提示1：PFA+5qC55o2uSDxTVUI+bjwvU1VCPlhPPFNVQj4ybi0xPC9TVUI+5Y+v5rGC5b6XWOeahOWMluWQiOS7t+S4uisoM24tMik8L1A+
- 提示2：PFA+6Iulbj1s77yM5YiZWOWFg+e0oOeahOWMluWQiOS7t+S4uits77yM5YW25ZCM5Lu35oCB55qE5rCn5YyW54mp55qE5YyW5a2m5byP5Li6WDxTVUI+MjwvU1VCPk88L1A+
- 提示3：PFA+6Iulbj0y77yM5YiZWOWFg+e0oOeahOWMluWQiOS7t+S4uis077yM5YW25ZCM5Lu35oCB55qE5rCn5YyW54mp55qE5YyW5a2m5byP5Li6WE88U1VCPjI8L1NVQj48L1A+
- 提示4：PFA+6Iulbj0z77yM5YiZWOWFg+e0oOeahOWMluWQiOS7t+S4uis377yM5YW25ZCM5Lu35oCB55qE5rCn5YyW54mp55qE5YyW5a2m5byP5Li6WDxTVUI+MjwvU1VCPk88U1VCPjc8L1NVQj48L1A+
- 答案：QSxC
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
两种化合物AB和CB2。若A元素的化合价与H2O中O的化合价的绝对值相同，则C的化合价为（ ）
| A: +4 |
| B: -4 |
| C: +3 |
| D: -3 |
一次做对，真牛！
+5奖励规则>
- 提示1：PFA+QeWFg+e0oOeahOWMluWQiOS7t+S4jkg8U1VCPjI8L1NVQj5P5LitT+eahOWMluWQiOS7t+e7neWvueWAvOebuOWQjO+8jOWPr+efpUHlhYPntKDnmoTljJblkIjku7fnu53lr7nlgLzkuLoyPC9QPg==
- 提示2：PFA+5Zug5Li65YyW5ZCI54mpQULljp/lrZDorqHph4/mlbDpg73mmK8x77yM5pWF5Y+v55+lQuWFg+e0oOeahOWMluWQiOS7t+e7neWvueWAvOS5n+aYrzI8L1A+
- 提示3：PFA+5YyW5ZCI54mp5YyW5a2m5byP6YG15a6I5q2j5Lu35Zyo5YmN6LSf5Lu35Zyo5ZCO77yM5Y+v55+lQuWFg+e0oOaYry0y5Lu3PC9QPg==
- 提示4：PFA+5qC55o2u5YWD57Sg5YyW5ZCI5Lu35LiO6K6h6YeP5pWw55qE5LmY56ev5LmL5ZKM5Li66Zu277yMWMOXMSvvvIgtMu+8icOXMj0wIOino+W+l1g9KzQ8L1A+
- 答案：QQ==
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
