A.吸熱反應(yīng) B.放熱反應(yīng) C.加氫反應(yīng) D.脫硫反應(yīng)
A.對(duì)稱次序 B.間隔次序 C.順時(shí)針次序 D.逆時(shí)針次序
A.潤(rùn)滑脂 B.密封劑 C.潤(rùn)滑油 D.防高溫咬合劑