A.0.015%~0.025% B.0.02%~0.03% C.0.025%~0.035% D.0.027%~0.037%
A.產(chǎn)品品種指標(biāo) B.產(chǎn)品質(zhì)量指標(biāo) C.產(chǎn)品產(chǎn)量指標(biāo) D.產(chǎn)值指標(biāo)
A.≤1.0 B.2.7~2.8 C.3.0~3.2 D.≥3.5