Daniel doesn’t like to argue ______others and he can deal______ difficulties.

A．with, with

B．with, in

C．for, to

D．to, with

矩形风管的长、宽分别为A、月，则其当量直径为( )。

A．2AB/(A+

B．(A+/2

C．(A+/(2A

D．(A+/(A