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.下列对水的叙述正确的是
| A: 水由氢气和氧气组成 |
| B: 地球上淡水资源非常丰富 |
| C: 过滤能除去水中所有杂质 |
| D: 水的污染会引起土壤污染 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rC05piv5LiA56eN57qv5YeA54mp77yM55Sx5rCi5YWD57Sg5ZKM5rCn5YWD57Sg5p6E5oiQ44CC
- 提示2：6L+H5ruk5Y+q6IO96Zmk5Y675rC05Lit55qE5LiN5rq25oCn5p2C6LSo
- 答案：RA==
QeOAgeawtOaYr+eUseawouOAgeawp+S4pOenjeWFg+e0oOe7hOaIkOeahO+8jOaVhemUme+8mzxicj5C44CB5Zyw55CD5LiK5reh5rC05ZCr6YeP5b6I5bCR77yb5pWF6ZSZPGJyPkPjgIHov4fmu6Tlj6rog73pmaTljrvkuI3murbmgKfmnYLotKjvvIzmurbop6Pkuo7msLTnmoTnianotKjkuI3og73pmaTljrvvvJvmlYXplJk8YnI+ROOAgeeUqOaxoeafk+eahOawtOa1h+eBjOWcn+WcsOS8mumAoOaIkOWcn+WjpOaxoeafk++8m+aVheWvuTxicj7mlYXpgIlE
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列有关水的说法正确的是
| A: 电解水能生成H2和O2，二者体积比为1：2 |
| B: 无色、无臭、清澈透明的水就是纯水 |
| C: 水是由氢元素和氧元素组成的 |
| D: 生活中接触的纯水多，水溶液少 |
一次做对，真牛！
+5奖励规则>
- 提示1：5q+P5Liq5rC05YiG5a2Q5Lit5ZCr5pyJMuS4qkjljp/lrZDlkowx5Liq5rCn5Y6f5a2Q77yM5Zug5q2k54K56Kej5ZCO55Sf5oiQ55qE5rCi5rCU5L2T56ev5bqU5aSn5LqO5rCn5rCU55qE5L2T56ev44CC
- 提示2：55Sf5rS75Lit55qE5rC06YO95ZCr5pyJ5YW25LuW5p2C6LSo77yM57qv5rC06L6D5bCR44CC
- 答案：Qw==
QeOAgeeUteino+awtOeUn+aIkOawouawlOWSjOawp+awlOeahOS9k+enr+avlOS4ujLvvJox77yM5pWF6ZSZ6K+v77ybPGJyPkLjgIHmtbfmsLTml6DoibLjgIHml6Doh63jgIHmuIXmvojpgI/mmI7kvYbkuI3mmK/nuq/msLTvvJvmlYXplJnor6/vvI48YnI+Q+OAgeawtOaYr+eUseawouWFg+e0oOWSjOawp+WFg+e0oOe7hOaIkOeahO+8jOaVheato+ehru+8mzxicj5E44CB5aSp54S25rC05aSn6YOo5YiG5piv5rC05rq25ray77yM57qv5rC06L6D5bCR77yM5pWFROmUmeivr++8jjxicj7mlYXpgIlD
本课配套习题挑战模式3/5
单选题
难度系数：
3.下列有关水的描述，错误的是
| A: 构成水的最小微粒是水分子 |
| B: 水是由氢元素和氧元素组成的 |
| C: 水是由氢原子和氧原子构成的 |
| D: 水分子是由氢原子和氧原子构成的 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u54mp6LSo55qE57uE5oiQ5Y+K5p6E5oiQ6Kej562U77yMIA==
- 提示2：5p6E5oiQ54mp6LSo55qE5b6u57KS5pyJ5YiG5a2Q44CB5Y6f5a2Q5ZKM56a75a2Q77yM5YiG5a2Q5piv55Sx5Y6f5a2Q5p6E5oiQ55qE77yO
- 提示3：54mp6LSo5piv55Sx5YWD57Sg57uE5oiQ55qE
- 答案：Qw==
QeOAgeawtOaYr+eUseawtOWIhuWtkOaehOaIkOeahO+8jOaVhUHor7Tms5XmraPnoa7vvJs8YnI+QuOAgeawtOeahOWMluWtpuW8j+S4uu+8mkg8c3ViPjI8L3N1Yj5P77yM5piv55Sx5rCi5YWD57Sg5ZKM5rCn5YWD57Sg57uE5oiQ55qE77yM5pWFQuivtOazleato+ehru+8mzxicj5D44CB5rC05piv55Sx5rC05YiG5a2Q5p6E5oiQ55qE77yM5rC05YiG5a2Q5piv55Sx5rCi5Y6f5a2Q5ZKM5rCn5Y6f5a2Q5p6E5oiQ55qE77yM5pWFQ+ivtOazlemUmeivr++8mzxicj5E44CB5rC05YiG5a2Q5piv55Sx5rCi5Y6f5a2Q5ZKM5rCn5Y6f5a2Q5p6E5oiQ55qE77yM6K+05rOV5q2j56Gu77yOPGJyPuaVhemAiUPvvI4=
本课配套习题挑战模式4/5
单选题
难度系数：
4.下列说法中错误的是
| A: 电解水生成氢气和氧气，说明水是由氢气和氧气组成的 |
| B: 氢气和氧气反应生成水，说明水是由氢、氧两种元素组成的 |
| C: 海水、湖水是混合物，氢气燃烧生成的水是纯净物 |
| D: 氢气燃烧生成水的反应是化合反应，水电解生成氢气和氧气的反应是分解反应 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u55S16Kej5rC05a6e6aqM55qE57uT6K666ICD6JmRQemAiemhuQ==
- 提示2：5qC55o2u5rC055qE57uE5oiQ6ICD6JmRQumAiemhuQ==
- 提示3：5qC55o2u5re35ZCI54mp5ZKM57qv5YeA54mp55qE5Yy65Yir6ICD6JmRQ+mAiemhuQ==
- 提示4：5qC55o2u5YyW5ZCI5Y+N5bqU5ZKM5YiG6Kej5Y+N5bqU55qE54m554K56ICD6JmRROmAiemhuQ==
- 答案：QQ==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.下列能证明水是由氢和氧两种元素组成的是
| A: 水的净化 |
| B: 水的汽化 |
| C: 水的电解 |
| D: 水的蒸馏 |
一次做对，真牛！
+5奖励规则>
- 提示1：5rC057uP54K56Kej5ZCO5pS+5Ye65rCi5rCU5LiO5rCn5rCU77yM6IO95aSf6K+B5piO5YW257uE5oiQ44CC
- 答案：Qw==
QeOAgeawtOeahOWHgOWMlumZpOWOu+awtOS4reeahOWPr+a6tuaAp+WSjOS4jea6tuaAp+eahOadgui0qO+8jOaXoOazleWIpOaWreawtOeahOe7hOaIkO+8jjxicj5C44CB5rC05rG95YyW5piv5ray5oCB55qE5rC05Y+Y5Li65rCU5oCB5rC055qE6L+H56iL77yM5Y+R55Sf54mp55CG5Y+Y5YyW77yM5peg5rOV5Yik5pat5rC055qE57uE5oiQ77yOPGJyPkPjgIHmsLTpgJrnlLXlj6/ku6XliIbop6Plh7rmsKLmsJTlkozmsKfmsJTvvIzmraPmnoHkuqfnlJ/msKfmsJTjgIHotJ/mnoHkuqfnlJ/msKLmsJTvvIzkuozogIXmsJTkvZPkvZPnp6/kuYvmr5TkuLox77yaMu+8m+e7hOaIkOawouawlOeahOawouWFg+e0oOOAgeawp+awlOeahOawp+WFg+e0oOmDveadpeiHquawtO+8jOaJgOS7peawtOaYr+eUseawouOAgeawp+S4pOenjeWFg+e0oOe7hOaIkOeahO+8juaVhUPog73liKTmlq3msLTnmoTnu4TmiJDvvI48YnI+ROOAgeawtOeahOiSuOmmj+aYr+mZpOWOu+awtOS4reWPr+a6tueahOeJqei0qOeahOaTjeS9nO+8jOaXoOazleWIpOaWreawtOeahOe7hOaIkO+8jjxicj7mlYXnrZTmoYjvvJpD77yO
