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参考答案
一、选择题
1. C
2. C
3. D
4. B
5. A
6. A
7. C
8. D
9. C
10. B
二、实验探究题
11.
(1)
(2) 0.45 m/s, 偏小
(3) 变速
12.
(1) 温度计的玻璃泡接触到了容器底部, 秒表
(2) 正在, 水蒸气
(3) 略
(4) 98°C, 继续吸热但温度保持不变
(5) 升高
13.
(1) 52°C
(2) 吸收, 不变
(3) B
14.
(1) A 和 B
(2) 琴弦的长短
(3) 0.76
15.
(1) 秒表、刻度尺
(2) 略
(3) v = s/t
三、综合应用题
16.
错因分析：1.19 cm 与其他数据偏差较大，属于错误数据，不能参与平均值计算。
正确解答：L = (1.90 cm + 1.91 cm + 1.89 cm) / 3 = 1.90 cm
17.
(1) 液化
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(2) 在轨水生生态研究项目
(3) 静止
(4) 不是
18.
“小冰粒”是冰箱内的水蒸气遇冷凝华形成的；“小水珠”是排骨上的冰粒在室温下熔化形成的。
19.
略
20.
s
(1) t = = 24 km / 100 km/h = 0.24 h
v
s
(2) v = = 6.845 km / (4/60) h = 102.6 km/h, 超速
t
(3) L = v't' - s = 82 km/h * 0.3 h - 24 km = 4.6 km
21.
(1) t = 8:15 - 8:00 = 0.25 h
s
(2) v = t = 12 km / 0.25 h = 48 km/h
(3) s = v't' = 80 km/h * (3/60) h = 4 km
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