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There are two clocks in Rita’s room. It is half past four by the red clock on the bed. It is five o’clock by the green clock in the box. Rita has got two watches, too. One is under the table, the other is on the chair. It is four o’clock on the watch under the table. It is half past four on the watch on the chair.
1．How many clocks are there in Rita’s room? ( )| A．Four. | B．Two. | C．Three. |
| A．1:30. | B．5:30. | C．4:30. |
| A．In the box. | B．On the bed. | C．Under the table. |
| A．4:00. | B．5:30. | C．5:00. |
| A．4:00. | B．5:30. | C．4:30. |
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
