土壤有机质的碳氮比在(),分解过程容易发生微生物与生物争夺氮现象A、C/N25:1B、C/N25:1C、C/N=25:1
土壤有机质的碳氮比在(),分解过程容易发生微生物与生物争夺氮现象
- A、C/N<25:1
- B、C/N>25:1
- C、C/N=25:1
相关考题:
程序段N20 G00 X65.0 Z2.0; N25 G94 X40.0 Z0.0 F0.1;可以用程序段()代替(FANUC系统)。A、N20 G00 X65.0 Z2.0; N25 G94 U-25. Z0.0 F0.1B、N20 G00 X65.0 Z2.0; N25 G94 X40.0 W-2.0 F0.1C、N20 G00 X65.0 Z2.0; N25 G94 U-25.0 W-2.0 F0.1D、N20 G00 X65.0 Z2.0; N25 G94 U0.0 Z0.0 F0.1E、N20 G00 X65.0 Z2.0; N25 G94 X40.0 W0.0 F0.1
程序段N20 G00 X65.0 Z0.0; N25 G80 X60.0 Z–35.0 R–5.0 F0.1;可以用程序段()代替(华中系统)。A、N20 G00 X65.0 Z0.0; N25 G80 U-5.0 Z–35.0 R–5.0 F0.1B、N20 G00 X65.0 Z0.0; N25 G80 X60.0 W–35.0 R–5.0 F0.1C、N20 G00 X65.0 Z0.0; N25 G80 U-5. W–35.0 R–5.0 F0.1D、N20 G00 X65.0 Z0.0; N25 G80 U5.0 Z–35.0 R–5.0 F0.1E、N20 G00 X65.0 Z0.0; N25 G80 X60.0 W35.0 R–5.0 F0.1
N25—35—1中的N代表(),25代表(),35代表()