A.1%~10% B.11%~50% C.51%~80% D.80%以上
A.規(guī)模化經(jīng)營(yíng)問(wèn)題B.產(chǎn)品定位問(wèn)題C.標(biāo)準(zhǔn)化問(wèn)題D.配套設(shè)施、設(shè)備開(kāi)發(fā)E.種植戶自給自足
A.12h B.16h C.24h D.36h