学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
Write “T” for True and “F” for False beside the statements.
Kangaroos
There are many kangaroos in Australia and not only in zoos. You can see them everywhere outside the cities and towns. Kangaroos have very strong legs, so they are very good at jumping. Their tails are very strong, too. So when they want to have a rest, they rest on their tails. Kangaroos are also very good at looking their babies. Mother Kangaroos keep their babies safe in their pockets
Write “T” for True and “F” for False beside the statements.
(   )⒈There are many kangaroos in America.
(   )⒉Kangaroos have very strong legs.
(   )⒊Kangaroos’ tails are very strong, too.
(   )⒋Mother kangaroos keep their babies safe in their pockets.
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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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