搜索
American children love watching TV. Some of them spend six hours a day at school and four to six hours a day in front of the television set. Some of them even watch for eight hours or more on Sundays.
A child can learn bad things and good things from TV. Some programmes help children learn to do a lot of housework， just like gardening, cooking and cleaning.
But some programmes are not good for children. So parents must help them to choose the right ones to enjoy.
(1). Most American children spend about six hours on TV during their holidays.
(2). Children can't learn anything from TV.
(3). Some programmes help children learn how to make food.
(4). Children need parents help to choose good programmes.
(5). All the TV programmes are good for children.
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
