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.
小明家的芹菜茎秆细弱，施钾肥可免其倒伏，他应施加的化肥是（ ）
| A: KOH |
| B: Ca3（PO4）2 |
| C: K2CO3 |
| D: CO（NH2）2 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5bCP5piO5a6255qE6Iq56I+c6IyO56eG57uG5byx77yM5pa96ZK+6IKl5Y+v5YWN5YW25YCS5LyP77yb5qC55o2u5ZCr5pyJ5rCu5YWD57Sg55qE6IKl5paZ56ew5Li65rCu6IKl77yM5ZCr5pyJ56O35YWD57Sg55qE6IKl5paZ56ew5Li656O36IKl77yM5ZCr5pyJ6ZK+5YWD57Sg55qE6IKl5paZ56ew5Li66ZK+6IKl77yM5ZCM5pe25ZCr5pyJ5rCu44CB56O344CB6ZK+5LiJ56eN5YWD57Sg5Lit55qE5Lik56eN5oiW5Lik56eN5Lul5LiK55qE6IKl5paZ56ew5Li65aSN5ZCI6IKl77yMPGJyPjwvcD4=
- 答案：Qw==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
草木灰是一种农家肥，其主要成分是K2CO3，它属于（ ）
| A: 钾肥 |
| B: 磷肥 |
| C: 氮肥 |
| D: 复合肥 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ZCr5pyJ5rCu5YWD57Sg55qE6IKl5paZ56ew5Li65rCu6IKl77yM5ZCr5pyJ56O35YWD57Sg55qE6IKl5paZ56ew5Li656O36IKl77yM5ZCr5pyJ6ZK+5YWD57Sg55qE6IKl5paZ56ew5Li66ZK+6IKl77yM5ZCM5pe25ZCr5pyJ5rCu44CB56O344CB6ZK+5LiJ56eN5YWD57Sg5Lit55qE5Lik56eN5oiW5Lik56eN5Lul5LiK55qE6IKl5paZ56ew5Li65aSN5ZCI6IKlPGJyPjwvcD4=
- 答案：QQ==
PHA+6Kej77ya6I2J5pyo54Gw55qE5Li76KaB5oiQ5YiG5pivSzxzdWI+Mjwvc3ViPkNPPHN1Yj4zPC9zdWI+5Lit5ZCr5pyJ6ZK+5YWD57Sg77yM5bGe5LqO6ZK+6IKl77yOPGJyPuaVhemAiUE8YnI+PC9wPg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.
下列化肥中，从外观即可与其他化肥相区别的是（ ）
| A: 硫酸钾 |
| B: 硝酸铵 |
| C: 磷矿粉 |
| D: 氯化钾 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5LuO5aSW6KeC55yL5Li76KaB5piv5a+55a6D5Lus55qE54mp55CG5oCn6LSo5Lit55qE6aKc6Imy54q25oCB5rCU5ZGz562J5pa56Z2i6L+b6KGM5YiG5p6QPGJyPjwvcD4=
- 答案：Qw==
PHA+6Kej77ya56Gr6YW46ZK+44CB56Gd6YW46ZO144CB5rCv5YyW6ZK+5LuO5aSW6KeC55yL5Z2H5Li655m96Imy5oiW5peg6Imy5pm25L2T77yM5Y+q5pyJ56O355+/57KJ5piv54Gw6Imy5oiW6KSQ6Imy57KJ5pyr77yM5pWF5LiO5YW25a6D5YyW6IKl5LuO5aSW6KeC55yL5LiO56O355+/57KJ5LiN5ZCM77yMPGJyPuaVhemAie+8mkM8YnI+PC9wPg==
本课配套习题挑战模式4/5
单选题
难度系数：
4.
“庄稼一枝花，全靠肥当家．”下列关于农作物和化肥的说法正确的是（ ）
| A: （NH4）2SO4属于复合肥料 |
| B: 农作物所必需的营养元素只有氮、磷和钾三种 |
| C: 磷肥能使作物根系发达，耐寒耐旱 |
| D: 铵态氮肥与熟石灰混合施用可以明显提高肥效 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5rCu56O36ZK+6L+Z5LiJ56eN5YWD57Sg5Lit5Y+q5ZCr5pyJ5rCu5YWD57Sg55qE5piv5rCu6IKl77yM5Y+q5ZCr5pyJ6ZK+5YWD57Sg55qE5piv6ZK+6IKl77yM5Y+q5ZCr5pyJ56O35YWD57Sg55qE5piv56O36IKl77yO5ZCr5pyJ5Lik56eN5oiW5Lik56eN5Lul5LiK5YWD57Sg55qE5YyW6IKl5piv5aSN5ZCI6IKl77yO5rOo5oSP77yM6KaB5LuO6L6p6K+B55qE6KeS5bqm55yL5b6F5YyW6IKl77yM5ZCI55CG55qE5L2/55So5YyW6IKl5Y+v5o+Q6auY5Yac5L2c54mp55qE5Lqn6YeP77yM5L2G5LiN5ZCI55CG55qE5L2/55So5YyW6IKl5Y+v6IO95a+86Ie05Zyf5aOk5p2/57uT77yM5Y+Y56Kx562J6Zeu6aKY77yM55Sa6Iez6YCg5oiQ5Lil6YeN55qE546v5aKD5rGh5p+TPGJyPjwvcD4=
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
实验室有三瓶化肥未贴标签，只知道它们分别是碳酸氢铵（NH4HCO3）、氯化铵（NH4Cl）和尿素[CO（NH2）2]中的一种，为鉴别三种化肥，某同学分别取少量样品编号为A、B、C，并进行如下实验（此处箭头表示得出实验结论）
根据上述实验，下列说法不正确的是（ ）
| A: 三种化肥中，尿素的含氮量最高 |
| B: |
| C: 常温下如要鉴别B、C两种样品，能能采取闻气味的方法 |
| D: 如果实验Ⅱ中B、C两种样品没有另取，则会使检验结果不准确 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6ZO15oCB5rCu6IKl55qE5qOA6aqM5ZKM56Kz6YW45rCi5qC556a75a2Q5LiO6YW45Y+N5bqU5Lqn55Sf5rCU5L2T77yM5bqU54af5oKJ54mp6LSo5LmL6Ze055qE5YyW5a2m5Y+N5bqU5Y+K5Y+N5bqU55qE546w6LGh77yM6IO95Yip55So546w6LGh5p2l56Gu5a6a54mp6LSoPGJyPjwvcD4=
- 答案：RA==
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
