A.青春期男孩和女孩应互相帮助,建立真诚的友谊 |
B.青春期男孩和女孩易于接受新鲜事物,是认识事物和学习的极好时机 |
C.青春期男孩和女孩生殖器官迅速发育,出现第二性特征,要注意生理保健 |
D.青春期生长发育快,代谢旺盛,耗能多,要减少运动,以减少能量消耗 |
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