. It's very kind ______ you ______ say so.
A.of, to
B.for, to
C.to, to
D.of, /
答案:A
All the ingredients are in the bowl. Please mix __.
A.it up
B.up it
C.up them
D.them up
局域网中各段线缆的最大长度若超出规定标准,其网络传输特性会受到()的影响。
A.回波损耗
B.趋肤效应
C.近端干扰
D.冲突检测