学进去-教育应平等而普惠
试题
类型:排序题
难度系数:0.40
所属科目:小学英语
阅读句子,按照说话的先后顺序用字母A、B、C、D、E、F排序。
(      ) Mother Duck: But they’re our friends. Let’s look after (照料) them!
(      ) Mother Duck: How lovely they are! But where is their mother? Let’s help them.
(      ) Mother Duck: Let me sit on the eggs.
(      ) Mother Duck: Look! Two eggs. One (一个) is big, the other (另一个) is small.
(      ) Mother Duck: Look! Two birds. A parrot and a crow (乌鸦).
(      ) Mother Duck: They’re not ducks. What can we do?
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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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