（ ） refers to the channel on a steep slope, and it is also known as the suspended ditch.
A: Chute
B: side ditches
C: seepage ditch
D: underdrain
A: Chute
B: side ditches
C: seepage ditch
D: underdrain
举一反三
- Polders working together with embankment, sluice and ditch can block the flood.
- When underway in a channel，you should keep to the（）. A: Middle of the channel B: Starboard side of the channel C: Port side of the channel D: Side of the channel that has the widest tur
- She gave him a _______ on the arm to wake him up. A: stitch B: pinch C: ditch D: punch
- She gave him a _______ on the arm to wake him up.[br][/br](2.0) A: stitch B: pinch C: ditch D: punch
- long distribution channel refers to a channel with one or no intermediary.