中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.我们熟悉的这些物质属于纯净物的是
| A: 干冰 |
| B: 石灰浆 |
| C: 食盐 |
| D: 食醋 |
一次做对，真牛！
+5奖励规则>
- 提示1：5bmy5Yaw5piv55Sx5LiA56eN54mp6LSo5LqM5rCn5YyW56Kz57uE5oiQ55qE77yM5bGe5LqO57qv5YeA54mp
- 提示2：55+z54Gw5rWG44CB6aOf55uQ44CB6aOf6YaL562J54mp6LSo5piv55Sx5aSa56eN54mp6LSo57uE5oiQ55qE77yM5bGe5LqO5re35ZCI54mp
- 答案：QQ==
QeOAgeW5suWGsOaYr+eUseS4gOenjeeJqei0qOS6jOawp+WMlueis+e7hOaIkOeahO+8jOWxnuS6jue6r+WHgOeJqe+8jjxicj5C44CB55+z54Gw5rWG5Lit5ZCr5pyJ5rC05ZKM5rCi5rCn5YyW6ZKZ562J54mp6LSo77yM5bGe5LqO5re35ZCI54mp77yOPGJyPkPjgIHpo5/nm5DnmoTkuLvopoHmiJDliIbmmK/msK/ljJbpkqDvvIzov5jlkKvmnInkuIDkupvlhbblroPmnYLotKjvvIzlsZ7kuo7mt7flkIjnianvvI48YnI+ROOAgemjn+mGi+S4reWQq+aciemGi+mFuOWSjOawtO+8jOWxnuS6jua3t+WQiOeJqe+8jjxicj7mlYXpgIlB77yO
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列四组物质中，依次属于单质、氧化物、盐的是
| A: 氦气、氧化铜、铁强化食用盐 |
| B: 水、二氧化硫、氯酸钾 |
| C: 氧气、氧化铁、硫酸铜 |
| D: 水银、氧化镁、氨水 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Y2V6LSo5piv55Sx5LiA56eN5YWD57Sg57uE5oiQ55qE57qv5YeA54mp77yb
- 提示2：5rCn5YyW54mp5piv55Sx5Lik56eN5YWD57Sg57uE5oiQ55qE5YyW5ZCI54mp77yM5YW25Lit5LiA56eN5piv5rCn5YWD57Sg77yb
- 提示3：55uQ5piv55Sx6YeR5bGe56a75a2Q5ZKM6YW45qC556a75a2Q5p6E5oiQ77yM6ZO155uQ6Zmk5aSW44CC
- 答案：Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.现有①粗盐：②液态氧：③纯碱：④洁净的海水。对上述物质的分类正确的是
| A: 盐--------① |
| B: 单质----② |
| C: 碱-------③ |
| D: 纯净物----④ |
一次做对，真牛！
+5奖励规则>
- 提示1：57KX55uQ5piv5re35pyJ5p2C6LSo55qE55uQ
- 提示2：5rSB5YeA55qE5rW35rC05Lit5Lmf5ZCr5pyJ5b6I5aSa5b6u6YeP5YWD57Sg5Lul5Y+K6ZKg56a75a2Q44CB5rCv56a75a2Q562J44CC
- 答案：Qg==
QeOAgeeyl+ebkOWxnuS6jua3t+WQiOeJqe+8jOebkOW/hemhu+aYr+e6r+WHgOeJqe+8m+aVhemAiemhuemUmeivr++8mzxicj5C44CB5ray5oCB5rCn5piv55Sx5LiA56eN5YWD57Sg57uE5oiQ55qE57qv5YeA54mp77yM5bGe5LqO5Y2V6LSo77yb5pWF6YCJ6aG55q2j56Gu77ybPGJyPkPjgIHnuq/norHmmK/norPphbjpkqDvvIzlsZ7kuo7nm5DvvI7mlYXpgInpobnplJnor6/vvJs8YnI+ROOAgea0geWHgOeahOa1t+awtOaYr+eUseWkmuenjeeJqei0qOe7hOaIkOeahO+8jOWxnuS6jua3t+WQiOeJqe+8juaVhemAiemhuemUmeivr++8mzxicj7mlYXpgIlC77yO
本课配套习题挑战模式4/5
单选题
难度系数：
4.一瓶无色透明的液体，经分析只含有氢元素和氧元素，那么这瓶液体
| A: 一定是化合物 |
| B: 一定是混合物 |
| C: 可能是化合物 |
| D: 可能是单质 |
一次做对，真牛！
+5奖励规则>
- 提示1：5Y+q5ZCr5pyJ5rCi5YWD57Sg5ZKM5rCn5YWD57Sg55qE5ray5L2T77yM6Zmk5LqG5rC05LmL5aSW6L+Y5pyJ6L+H5rCn5YyW5rCi44CC
- 答案：Qw==
QemAiemhueaYr+mUmeivr+eahOWPmei/sO+8jOWmguaenOaYr+awtOWSjOWPjOawp+awtOWwseS4jeaYr+WMluWQiOeJqe+8mzxicj5C6YCJ6aG55piv6ZSZ6K+v55qE5Y+Z6L+w77yM5aaC5p6c5piv5rC06L+Z56eN54mp6LSo5bCx5piv5YyW5ZCI54mp77ybPGJyPkPpgInpobnmmK/mraPnoa7nmoTlj5nov7DvvIzov5nnp43nianotKjlj6/og73mmK/ljJblkIjnianjgIHkuZ/lj6/og73mmK/mt7flkIjnianjgIHkuIDlrprkuI3mmK/ljZXotKjvvIzmlYXnrZTmoYjpgInmi6lD77ybPGJyPkTpgInpobnmmK/plJnor6/nmoTlj5nov7DvvI4=
本课配套习题挑战模式5/5
多选题
难度系数：
5.某物质经分析只含有一种元素，下列有关该物质的说法正确的是
| A: 一定是纯净物 |
| B: 一定是单质 |
| C: 一定不是化合物 |
| D: 可能是混合物 |
一次做对，真牛！
+5奖励规则>
- 提示1：54mp6LSo5YiG5Li65re35ZCI54mp44CB57qv5YeA54mp77yM57qv5YeA54mp5YyF5ous5Y2V6LSo5ZKM5YyW5ZCI54mp77yM5Lmf5bCx5piv6K+05Y2V6LSo5ZKM5YyW5ZCI54mp55qE5YmN5o+Q6aaW5YWI6KaB5piv57qv5YeA54mp
- 答案：QyxE
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
