When asked about their opinions about the schoolmaster, many teachers would prefer to see him step aside

_____ younger men. [ ]

A. in terms of

B. in need of

C. in favor of

D. in praise of

洞室爆破方法包括（）。

A.抛掷爆破

B.毫秒爆破

C.定向爆破

D.松动爆破