学进去-教育应平等而普惠
试题
类型:选择题
难度系数:0.65
所属科目:小学英语
根据情景选择正确的一项。
(______)1. 丽丽看见杨明坐在树下,她可以说:
A. Yang Ming is sitting under the tree.
B. Yang Ming is sitting on the tree.
(______)2. 你看见小伙伴很伤心,你可以说:
A. He looks very sad.
B. He looks very angry.
(______)3. 你看见小伙伴很生气,你可以说:
A. He looks very sad.
B. He looks very angry.
(______)4. 你看见小伙伴很疲倦,你可以说:
A. He looks very tired.
B. He looks very sad.
(______)5. 妹妹没有考好,你可以对她说:
A. Come in!
B. Cheer up!
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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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