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| Toy | Colour | Price |
 | blue | ¥8 (¥15/2 fans) |
 | orange | ¥16 |
 | brown | ¥45 |
 | red | ¥28 (¥50/2 toy cars) |
 | green | ¥35 |
| * Buy (买) two brown toy bears and you can get one orange kite for free (免费). | ||
1．Two red toy cars are _______ yuan. ( )
| A．fifteen | B．fifty-six | C．fifty |
| A．forty-three | B．fifty-one | C．sixty-five |
| A．Thirty-eight yuan. | B．Thirty-nine yuan. | C．Forty yuan. |
| A．two green toy cars | B．a brown toy bear | C．four orange kites |
| A．forty-five | B．sixty-one | C．ninety |
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
