A.要約B.承諾C.要約邀請(qǐng)D.新要約
A.實(shí)質(zhì)性特點(diǎn)和進(jìn)步 B.實(shí)質(zhì)性特點(diǎn)和顯著的進(jìn)步 C.突出的實(shí)質(zhì)性特點(diǎn)和明顯的進(jìn)步 D.突出的實(shí)質(zhì)性特點(diǎn)和顯著的進(jìn)步
A.侵權(quán)行為 B.不當(dāng)?shù)美?br /> C.無(wú)因管理 D.單方法律行為