学进去-教育应平等而普惠
试题
类型:词图匹配
难度系数:0.65
所属科目:小学英语
读一读,选一选。
A.
B.
C.
D.
E.
F. plant trees
G. give flowers to teachers
H. have a big dinner together
I. on the 3rd Sunday of June
J. sing and dance at the party
1.Father’s Day (_______)(_______)
2.Teacher’s Day (_______)(_______)
3.Tree-Planting Day (_______)(_______)
4.Children’s Day (_______)(_______)
5.Chinese New Year (_______)(_______)
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优质答疑

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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