A.10~12mm,1mm B.12~14mm,1mm C.10~12mm,2mm D.12~14mm,2mm E.以上均不是
A.性能B.技術(shù)C.特點(diǎn)D.都不對
A.再生式轉(zhuǎn)型B.轉(zhuǎn)讓式轉(zhuǎn)型C.政府干預(yù)