学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.94
所属科目:小学英语
根据提示选择。(20分)
 
(1)This is my friend, Daming. He’s  ___________(正在照相)
(2)What’s Amy doing ? She’s ___________(正在和她的朋友交谈)
(3)What are you doing , Sam? I’m _____________(正在听音乐)
(4)What’s Tom doing ? He’s  ___________(正在看书)
(5)What are they doing? They’re  ____________(正在划龙舟)
(6)Look at the men under the tree. They’re  ____________(正在下象棋)
(7)They’re  _________(正在喝)soybean milk!
(8)Amy is  __________(正在跑步)
(9)Daming is  __________(正在跳)
(10)What are you doing , Lingling? I’m __________(正在写一封信)
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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

用户名称
2019-09-19

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

用户名称
2019-09-19
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