A.On a bus …
B.On a train …
C.On a bike …
D.On a car …
E.On a plane …
F.On a boat…
(____) 1.You mustn’t walk around during landing.
(____) 2. You mustn’t talk to the driver.
(____) 3. You must wear a helmet.
(____) 4. You must wear a seatbelt.
(____) 5. You mustn’t put your head out of the window.
(____) 6. You must wear a lifejacket.
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