A.队员在屈肘划桨时,上肢的肱二头肌舒张,肱三头肌收缩 |
B.队员通过反复训练不断提高划船技能,这是一种学习行为 |
C.骨骼肌受到神经传来的刺激收缩,牵动骨绕关节活动,完成划桨动作 |
D.人的运动所着能量有赖于消化系统、呼吸系统、循环系统等系统的配合 |
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