学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语

The United States of America is in North America. The 1. is Washington, D.C. New York is the biggest city in the U.S.A. It is in the east of the country. Sara is from New York. English is her mother tongue.

Mike is from Canada. Canada is in 2., too. Ottawa is the capital city. It’s in the east of Canada. There is a red maple leaf in the centre of the Canadian national flag. Canadians speak both 3..

Cathy is from the U.K. Its capital is London. London is an old city. Do you know Big Ben and the Thames? They are very famous. Big Ben is a big 4.. The Thames is a long and wide 5..

A.capital cityB.clockC.riverD.North AmericaE.English and French
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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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