镜子数 | 不用镜 | 一面镜 | 两面镜 | 三面镜 |
①组 | 26 | 20 | 24 | 27 |
②组 | 18 | 21 | 23 | 26 |
③组 | 19 | 22 | 33 | 35 |
(1)以上3组同学测量活动中,第________组是正确的,请你在下面表格中完成矩形统计图。
(2)从数据中分析,光的强弱和温度有什么关系?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2