有机肥料
参考答案：天然有机质经微生物分解或发酵而成的一类肥料。
刀具几何参数选择
A shipboard Oil Pollution Emergency Plan is required of（）.
A.all vessels，regardless of size and commercial application
B.any barge or ship constructed or operated in such a manner that no oil in any form can be carried aboard
C.an oil tanker of 150 gross tons and above，or other ship of 400 gross tons and above
D.an oil tanker of 400 gross tons and above，or other ships of 150 gross tons and above
