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| A． I have my own room now. It's big. There is a bed in my room. There is a desk next to the bed. I often do my homework on it. There is a big shelf near the desk. There are many books on it. Some are school books. Some are story books. I have a walkman, too. It's always on the bed. I use it to learn English. (1). My own room is very big. (2). There are two beds in my room. (3). I often do my homework on my desk. (4). Many books are always on the bed. (5). I use my walkman to learn English. |
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
