A.勞動(dòng)時(shí)間B.工作時(shí)間C.社會(huì)必要?jiǎng)趧?dòng)時(shí)間D.生產(chǎn)時(shí)間
A.初步設(shè)計(jì)B.優(yōu)化設(shè)計(jì)C.補(bǔ)充設(shè)計(jì)D.技術(shù)設(shè)計(jì)
A.斜 B.直 C.銳 D.鈍