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Sun Wei is a student of Grade 7. His sister is Sun Ling. She is a student of Grade 8. They are in the same school. The new term is coming. They come to a store and buy some school things in it. What do they buy? Please have a look! Sun Wei buys two notebooks and three pens. Sun Ling likes blue, so she buys a blue pencil box. The erasers look nice and she buys four. They buy two schoolbags. One is black and the other is red.
Pencil box | Notebook | Eraser |
 |  |  |
￥20.00 | ￥3.50 | ￥1.50 |
Schoolbag | Pen | Pencil |
 |  |  |
￥58.00 | ￥16.00 | ￥3.00 |
1．Sun Wei is Sun Ling’s ________.
| A．classmate | B．friend | C．brother | D．cousin |
| A．clothes | B．shoes | C．sports shoes | D．school things |
| A．￥32.00 | B．￥10.50 | C．￥42.50 | D．￥55.00 |
| A．black | B．red | C．blue | D．white |
| A．schoolbag | B．pen | C．eraser | D．pencil |
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
