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（____）1. A. go home B. go to school C. six o’clock
（____）2. A. one o’clock B. father C. ten o’clock
（____）3. A. uncle B. aunt C. nine to ten
（____）4. A. shell B. ring C. at
（____）5.A. apple B. science C. English D. art
（____）6.A. English B. P.
| A． C. Chinese D. class |
（____）8. A. three B. thirty C. first D. forty
（____）9.A. playground B. library C. music D. computer room
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
