搜索
[[QOrDeR]]This is my friend, Daming. He’s___________________（正在照相）.
【小题2】What’s Amy doing ? She’s _____________________（正在和她的朋友交谈）.
【小题3】What are you doing, Sam? I’m ___________________（正在听音乐）.
【小题4】What’s Tom doing ? He’s _____________________（正在看书）.
【小题5】What are they doing? They’re __________________（正在划龙舟）.
【小题6】Look at the men under the tree. They’re _____________（正在下象棋）.
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
