进气采用哪条路径？（） 

• A、化油器（或节气门体） — 空气滤清器 — 进气歧管 — 进气道 — 气缸
• B、空气滤清器 — 化油器（或节气门体） — 进气道 — 进气歧管 — 气缸
• C、空气滤清器 — 进气歧管 — 化油器（或节气门体） — 进气道 — 气缸
• D、空气滤清器 — 化油器（或节气门体） — 进气歧管 — 进气道 — 气缸