A.外界空气进入人体肺部:鼻→咽→喉→气管→支气管→肺 |
B.食物通过消化道:口腔→咽→食道→胃→大肠→小肠→肛门 |
C.完成反射活动过程:效应器→传入神经→神经中枢→传出神经→感受器 |
D.人体肺循环的过程:左心室→肺动脉→肺部毛细血管→肺静脉→右心房 |

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

