搜索
| | Sarah | John | Mike | Amy | |
 | three | two | five | five | |
 | nine | ten | two | one | |
 | six | four | four | six | |
 | ten | two | six | eight | |
 | seven | five | four | two | |
| eleven fourteen fifteen eighteen twenty | | ||||
1．—How many books do they have?
—They have
2．—How many pencils do John and Amy have?
—They have
3．—How many rulers do they have?
—They have
4．—How many erasers do Amy and Mike have?
—They have
5．—How many flowers do they have?
—They have
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
