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（_____） 1. A. This is our library. B. This is our meeting room. C. This is our science lab.
（_____） 2. A. Can I have a toy train? B. Can I help you? C. Can I have a motorbike?
（_____） 3. A. Don’t make noise. B. Don’t eat in class. C. Don’t be late for school.
（_____） 4. A. I have a bad cold. B. I have a cough. C. I have a fever.
（_____） 5. A. They are playing football. B. They are playing basketball. C. They are playing baseball.
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
