考察下列詞語的讀音,根據(jù)語流音變的類型將其分別填入A、B、C、D四項(xiàng)中
①分[f?n]+配[p‘ei]→分配[f? mp‘ ei]
②喇[IA]+叭[pA] →喇叭[lAb?]
③豆[tou]+腐[fu] →豆腐[touv]
④慢[man]+慢兒[mar]→慢慢兒[m aimar]
⑤look[luk](看)+ed[d](動詞過去時)→ looked[ lukt]
⑥in[in](在……上)+ bed[ bed](床)→ inbed[imbed]
A.同化:
B.異化:
C.弱化:
D.脫落: