A.上午9时和9时41分发出乐声,9时和9时41分指的是时间间隔 |
B.该音乐钟每隔40分钟发出一次乐声,每隔40分钟指的是时间间隔 |
C.该音乐钟持续发出1分钟的美妙乐声,1分钟指的是时刻 |
D.该音乐钟在上午10时22分时会再次发出乐声,10时22分指的是时间间隔 |
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