搜索
I’m Mary. There are 40 students in my class. We come from different places. We go to school in different ways. Fifteen students go to school on foot because they live near the school. Ten students live not far from the school. They often go to school by bike. Ten students go to school by bus because they live far away from the school. The other five students go to school by boat because there is a river on their way to school and there is no bridge.
1．There are fourteen students in Mary’s class.2．The students in Mary’s class go to school in the same way.
3．Fifteen students walk to school because they live near the school.
4．Ten students ride their bikes to school because they live not far from the school.
5．Five students in Mary’s class go to school by boat.
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
