学进去-教育应平等而普惠
试题
类型:单选题
难度系数:0.94
所属科目:小学英语
根据提示选择
1. This is my ________( 脸 )
A. head                          B. face                    C. mouth               D. finger
2. Touch your_________(   鼻子 )
A. nose                          B. eye                      C. ear                  D. face
3. Look at my __________      眼睛   
A. finger                         B. arm                      C. nose                 D. eye
4. I have 2   ____________ ( 耳朵   
A. ears                            B. eyes                    C. fingers               D. legs
5. Where is your   __________   ( 手   
A. face                         B. foot                   C. hand                  D. head
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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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