本课配套习题挑战模式2/5
单选题
难度系数:
2.把一块0℃的冰块投入0℃的水里(周围也是0℃)过了一段时间,下面的说法正确的是()
A: 有些冰熔化成水使水增多 |
B: 有些水凝固成冰使冰增多 |
C: 冰和水的数量都没有变 |
D: 以上三种情况都可能发生 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u54Ot5Lyg6YCS55qE5p2h5Lu277yM54mp5L2T6Ze05Y+q5pyJ5a2Y5Zyo552A5rip5bqm5beu5omN6IO96L+b6KGM54Ot5Lyg6YCS
- 答案:Qw==
5qC55o2u54Ot5Lyg6YCS55qE5p2h5Lu277yM54mp5L2T6Ze05Y+q5pyJ5a2Y5Zyo552A5rip5bqm5beu5omN6IO96L+b6KGM54Ot5Lyg6YCS77yO5qC55o2u6aKY5oSP77yM5Yaw44CB5rC05Y+K546v5aKD5Z2H5Li6MOKEg++8jOWboOatpOebuOS6kumXtOS4jeiDveWPkeeUn+eDreS8oOmAkueOsOixoe+8juWQjOaXtu+8jOaZtuS9k+WcqOeGlOWMlui/h+eoi+S4reWQuOeDre+8jOWcqOWHneWbuui/h+eoi+S4reimgeaUvuWHuueDremHj++8juaJgOS7peWGsOS4jeWQuOeDre+8juS4jeS8muiejeWMlu+8m+awtOS4jeaUvuWHuueDremHj++8jOS4jee7k+WGsO+8jg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.雪天路面有厚厚的积雪,为了使雪很快融化,常在路面积雪上喷洒盐水,这是为了()
A: 盐水可使冰的熔点降低 |
B: 盐水可使冰的熔点升高 |
C: 盐水可使冰的温度升高 |
D: 盐水可使冰的温度降低 |
一次做对,真牛!
+5奖励规则>
- 提示1:5b2x5ZON5pm25L2T54aU54K56auY5L2O55qE5Zug57Sg77ya54mp6LSo55qE56eN57G744CB5Y6L5Yqb55qE5aSn5bCP44CB5piv5ZCm5pyJ5p2C6LSo77yO56eN57G75LiN5ZCM77yM54aU54K55LiA6Iis5LiN5ZCM77yb5Y6L5Yqb6LaK5aSn77yM54aU54K56ZmN5L2O77yb5b2T5pyJ5p2C6LSo5Y+C5YWl5pe254aU54K56ZmN5L2O77yO
- 答案:QQ==
55uQ5Y+v5Lul55yL5oiQ5p2C6LSo77yM5q2k5pe26IO96ZmN5L2O5Yaw55qE54aU54K544CC6YCJQQ==
本课配套习题挑战模式5/5
单选题
难度系数:
5.海波的熔点是48℃,那么温度为48℃的海波的状态是
A: 一定是液态 |
B: 一定是固态 |
C: 一定是固液共存状态 |
D: 以上三种状态都可能 |
一次做对,真牛!
+5奖励规则>
- 提示1:5aaC5p6c5Zu65oCB5rW35rOi5ZyoNDjihIPml7bvvIznu6fnu63lkLjng63vvIzlsLHkvJrlvIDlp4vnhpTljJY=
- 提示2:5aaC5p6c5ray5oCB55qE5rW35rOi5ZyoNDjihIPml7bvvIznu6fnu63mlL7ng63vvIzlsLHkvJrlvIDlp4vlh53lm7o=
- 答案:RA==
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