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.
两只体积和质量完全相同的铝球和铜球（ρ铜＞ρ铝），对于它们是否空心的判断正确的是（ ）
| A: 两球一定都是空心的 |
| B: 两球可能都是实心的 |
| C: 铜球一定是空心的 |
| D: 铝球一定是实心的 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5aaC5p6c5piv6YO95piv5a6e5b+DLOi0qOmHj+ebuOWQjCzlr4bluqblpKcs5L2T56ev5bCPLjwvcD4=
- 提示2：PHA+5omA5Lul6LSo6YeP55u4562J5pe2LOmTneeQg+S9k+enr+Wkp+S6jumTnOeQg+S9k+enry48L3A+
- 提示3：PHA+546w5Zyo5L2T56ev55u45ZCMLOaJgOS7pemTnOeQg+S4gOWumuaYr+epuuW/g+eahCzpk53nkIPlj6/og73mmK/kuZ/lj6/og73kuI3mmK8uPC9wPg==
- 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.
质量为270g，体积为150cm3的空心铝球，中间空心部分的体积是（铝的密度2.7╳103kg/m3）（ ）
| A: 70cm3 |
| B: 100cm3 |
| C: 50cm3 |
| D: 105cm3 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55So6LSo6YeP6Zmk5Lul5a+G5bqm77yM5rGC5Ye65a6e5b+D5pe25YCZ55qE5L2T56ev44CCPC9wPg==
- 提示2：PHA+55So5oC75L2T56ev5YeP5Y675a6e5b+D5pe25YCZ5L2T56ev44CCPC9wPg==
- 提示3：PHA+57uT5p6c5bCx5piv56m65b+D6YOo5YiG5L2T56ev44CCPC9wPg==
- 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.
甲、乙、丙三个正方体，边长之比为1：2：3，质量分别为3g、24g、36g，已知它们是同种材料制成的，但有一个是空心的，空心正方体是（ ）
| A: 甲 |
| B: 乙 |
| C: 丙 |
| D: 无法判断 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5rGC5Ye655Sy5LmZ5LiZ55qE5a+G5bqm44CCPC9wPg==
- 提示2：PHA+5q+U6L6D5a+G5bqm5YWz57O777yM5LiN55u45ZCM55qE5LiA5Liq5piv56m65b+D44CCPC9wPg==
- 提示3：PHA+5YGH6K6+6YO95piv5a6e5b+D77yM6LSo6YeP5q+U562J5LqO5L2T56ev5q+U77yM5aaC5p6c566X5Ye65p2l6LSo6YeP5bCP5LqO6L+Z5Liq5q+U5YC85bCx5piv56m655qE44CCPC9wPg==
- 答案：Qw==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
质量、体积都相等的铁球、木球、铝球、铅球中可能不是空心的是（ ）
| A: 木球 |
| B: 铁球 |
| C: 铅球 |
| D: 铝球（ρ木＜ρ铝＜ρ铁＜ρ铅） |
一次做对，真牛！
+5奖励规则>
- 答案：QQ==
PGRpdj7lgYforr7lm5vkuKrnkIPpg73mmK/lrp7lv4PnmoTvvIzotKjph4/nm7jnrYnvvIw8L2Rpdj48ZGl2PuKItOeQg+eahOS9k+enr+S4ulY9bS8gz4Eg77yMPGJyPjwvZGl2PjxkaXY+4oi1z4HmnKjvvJzPgemTne+8nM+B6ZOB77ycz4Hpk4XvvIw8L2Rpdj48ZGl2PuKItFbmnKjvvJ5W6ZOd77yeVumTge+8nlbpk4XvvIw8L2Rpdj48ZGl2PuWPiOKIteWbm+S4queQg+eahOS9k+enr+ebuOetie+8jDwvZGl2PjxkaXY+4oi06ZOB55CD44CB6ZOc55CD5ZKM6ZOF55CD5LiA5a6a5piv56m65b+D55qE77yM5pyo55CD5Y+v6IO95piv5a6e5b+D44CB5Lmf5Y+v6IO95piv56m65b+DLjwvZGl2Pg==
本课配套习题挑战模式5/5
单选题
难度系数：
5.
三个体积和质量都相等的空心铝球、铜球和铁球（ρ铜＞ρ铁＞ρ铝），将空心部分注满水后，质量最大的是（ ）
| A: 铝球 |
| B: 铁球 |
| C: 铜球 |
| D: 三个球的质量一样大 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6LSo6YeP5L2T56ev6YO955u45ZCM77yM5rOo5ruh5rC05ZCO6LSo6YeP5pyA5aSn77yM5omA5Lul5q+U6L6D55qE5piv5rOo5rC06YeP5aSa5bCRPC9wPg==
- 提示2：PHA+5rOo5rC05pyA5aSa55qE5oC76LSo6YeP5pyA5aSn77yM5omA5Lul6LCB56m65b+D5aSn6LCB5pyA5ZCO5oC76LSo6YeP5aSn44CCPC9wPg==
- 提示3：PHA+6LSo6YeP5L2T56ev55u45ZCM77yM5a+G5bqm5aSn55qE56m65b+D5aSa77yM5omA5Lul5piv6ZOc55CD44CCPC9wPg==
- 答案：Qw==
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
