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| A． if vt<=v*1.1: k=0 elif vt<=v*1.5: k=200 else: k=2000 | B． if v*1.1<vt<=v*1.5: k=200 else: k=0 if vt>v*1.5: k=2000 | C． k=0 if vt>v*1.1: k=0 elif vt>v*1.5: k=200 | D． k=2000 if vt<=v*1.1: k=0 elif vt<=v*1.5: k=200 |
| A．A | B．B | C．C | D．D |
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
