在现代商标中，数量最大是（）。
A.文字商标
B.图形商标
C.组合商标
D.记号商标
参考答案：C
--- Hi, Torry, can I use your computer for a while this afternoon?
--- Sorry. ___________.
A．It’s repaired
B．It’s has been repaired
C．It’s being repaired
D．It’s had been repaired
建筑内部排水的流动特点？
