学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.65
所属科目:小学英语
听短文,根据短文内容选择正确答案。
( ) 1 What’s Mary’s last name?
A. Green.                      B. Grace.                              C. Brown.
( ) 2. What class is Jane in?
A. Class 2. B. Class 5. C. Class 4.
( ) 3. What color is Mary’s schoolbag?
A. Blue. B. Green. C. Purple.
( ) 4. What’s Jane’s phone number?
A. 8684325. B. 8684572. C. 8684752.
( ) 5. What’s the relationship(关系) between Jane and Mary?
A. Friends. B. Sisters. C. Classmates.
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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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