( )。
A.今天,李老师忘记布置作业了,于是小明给老师发微信:老师,发作业! |
B.清明节这天,刘莉给老师发了微信:老师,祝您节日快乐! |
C.小敏给同学东东发微信:东东,今天是你12岁大寿。祝您福如东海! |
D.陈成给老师发微信:老师好!我的习作发您邮箱了,请指导!谢谢! |
同类型试题
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
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