A.甲图用喝水杯做“纸片托水”实验,可以测量大气压的值 |
B.乙图为自制气压计,玻璃管内水柱升高说明外界大气压强增大 |
C.圆形水管左粗右细,水管中的气泡随水水平向右快速运动过程中体积会变大 |
D.丁图实验,向外拉活塞,试管内气压减小,原来停止沸腾的水一定会再次沸腾 |
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