狼牙山五壮士(节选)
五位壮士一面向顶峰攀登,一面依托大树和岩石向敌人射击。山路上又留下了许多具敌人的尸体。到了狼牙山峰顶,五位壮士居高临下,继续向紧跟在身后的敌人射击。不少敌人坠落山涧,粉身碎骨。班长马宝玉负伤了,子弹都打完了,只有胡福才手里还剩下一颗手榴弹。
2.请给这段文字拟个小标题:
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