A.小吴因父母离婚非常痛苦,他的好朋友小强知道后,劝他要乐观开朗 |
B.小李和小林是好朋友,在一次考试中,小李知道小林作弊,但没有告诉老师 |
C.小张和小王很要好,他们从不指出对方的缺点和错误,只说恭维话 |
D.小张学习成绩好,小王零花钱多,小张帮助小王做作业,小王给小张劳务费 |
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